diff --git a/src/basis/Basis.test.ts b/src/basis/Basis.test.ts
index 49e5e23a4..a77c59a30 100644
--- a/src/basis/Basis.test.ts
+++ b/src/basis/Basis.test.ts
@@ -8,9 +8,9 @@ import UnparsableExpression from '@nodes/UnparsableExpression';
 import Project from '../models/Project';
 import Example from '../nodes/Example';
 import { Basis } from './Basis';
-import DefaultLocale from '../locale/DefaultLocale';
+import DefaultLocale, { DefaultLocales } from '../locale/DefaultLocale';
 
-const basis = Basis.getLocalizedBasis(DefaultLocale);
+const basis = Basis.getLocalizedBasis(DefaultLocales);
 
 const source = new Source('basis', '');
 const project = Project.make(null, 'test', source, [], DefaultLocale);
@@ -66,7 +66,7 @@ function checkBasisNodes(nodes: Node[]) {
                             )}\nPrimary node: ${conflictingNodes.primary.node.toWordplay()}\n\t${
                             conflict.constructor.name
                         }\n${conflictingNodes.primary.explanation(
-                            basis.locales[0],
+                            basis.locales,
                             context
                         )}`
                     );
diff --git a/src/basis/Basis.ts b/src/basis/Basis.ts
index 8643023fd..b49712ee8 100644
--- a/src/basis/Basis.ts
+++ b/src/basis/Basis.ts
@@ -33,9 +33,10 @@ import { getNameLocales } from '../locale/getNameLocales';
 import bootstrapStructure from './StructureBasis';
 import { toTokens } from '../parser/toTokens';
 import parseType from '../parser/paresType';
+import type Locales from '../locale/Locales';
 
 export class Basis {
-    readonly locales: Locale[];
+    readonly locales: Locales;
     readonly languages: LanguageCode[];
     readonly shares: ReturnType<typeof createDefaultShares>;
 
@@ -45,9 +46,9 @@ export class Basis {
      */
     static readonly Bases: Map<string, Basis> = new Map();
 
-    constructor(locales: Locale[]) {
+    constructor(locales: Locales) {
         this.locales = locales;
-        this.languages = locales.map((locale) => locale.language);
+        this.languages = locales.getLanguages();
 
         this.addStructure('none', bootstrapNone(locales));
         this.addStructure('boolean', bootstrapBool(locales));
@@ -62,9 +63,8 @@ export class Basis {
         this.shares = createDefaultShares(locales);
     }
 
-    static getLocalizedBasis(locales: Locale | Locale[]) {
-        locales = Array.isArray(locales) ? locales : [locales];
-        const languages = locales.map((locale) => locale.language);
+    static getLocalizedBasis(locales: Locales) {
+        const languages = locales.getLanguages();
         const key = languages.join(',');
         const basis = Basis.Bases.get(key) ?? new Basis(locales);
         Basis.Bases.set(key, basis);
@@ -160,7 +160,7 @@ export class Basis {
 }
 
 export function createBasisFunction(
-    locales: Locale[],
+    locales: Locales,
     text: (locale: Locale) => FunctionText<NameAndDoc[]>,
     typeVars: TypeVariables | undefined,
     types: (Type | [Type, Expression])[],
diff --git a/src/basis/BoolBasis.ts b/src/basis/BoolBasis.ts
index 81d96baf7..b37f9caf6 100644
--- a/src/basis/BoolBasis.ts
+++ b/src/basis/BoolBasis.ts
@@ -13,8 +13,9 @@ import type Locale from '../locale/Locale';
 import type { FunctionText, NameAndDoc } from '../locale/Locale';
 import type Type from '../nodes/Type';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapBool(locales: Locale[]) {
+export default function bootstrapBool(locales: Locales) {
     function createBooleanFunction(
         text: (locale: Locale) => FunctionText<NameAndDoc[]>,
         inputs: Type[],
diff --git a/src/basis/InternalExpression.ts b/src/basis/InternalExpression.ts
index 7388aeb89..4606a0d09 100644
--- a/src/basis/InternalExpression.ts
+++ b/src/basis/InternalExpression.ts
@@ -9,7 +9,6 @@ import type Context from '@nodes/Context';
 import type TypeSet from '@nodes/TypeSet';
 import StartFinish from '@runtime/StartFinish';
 import SimpleExpression from '@nodes/SimpleExpression';
-import type Locale from '@locale/Locale';
 import InternalException from '@values/InternalException';
 import Glyphs from '../lore/Glyphs';
 import concretize from '../locale/concretize';
@@ -18,6 +17,7 @@ import Start from '@runtime/Start';
 import Finish from '@runtime/Finish';
 import { toTokens } from '../parser/toTokens';
 import parseType from '../parser/paresType';
+import type Locales from '../locale/Locales';
 
 export default class InternalExpression extends SimpleExpression {
     readonly type: Type;
@@ -106,12 +106,15 @@ export default class InternalExpression extends SimpleExpression {
         return this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.InternalExpression;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.InternalExpression);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.InternalExpression.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.InternalExpression.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/basis/Iteration.ts b/src/basis/Iteration.ts
index 26dd81a6c..27ede10cf 100644
--- a/src/basis/Iteration.ts
+++ b/src/basis/Iteration.ts
@@ -1,5 +1,4 @@
 import Purpose from '../concepts/Purpose';
-import type Locale from '../locale/Locale';
 import concretize from '../locale/concretize';
 import Glyphs from '../lore/Glyphs';
 import AnyType from '../nodes/AnyType';
@@ -23,6 +22,7 @@ import Next from '@runtime/Next';
 import Start from '@runtime/Start';
 import type Step from '@runtime/Step';
 import Value from '../values/Value';
+import type Locales from '../locale/Locales';
 
 const IterationState = 'state';
 
@@ -218,23 +218,26 @@ export class Iteration<State = any> extends Expression {
         return this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Iteration;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Iteration);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Iteration.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Iteration.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Iteration.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Iteration.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/basis/ListBasis.ts b/src/basis/ListBasis.ts
index ff58954ed..cb7b01511 100644
--- a/src/basis/ListBasis.ts
+++ b/src/basis/ListBasis.ts
@@ -20,7 +20,6 @@ import { getDocLocales } from '@locale/getDocLocales';
 import { getNameLocales } from '@locale/getNameLocales';
 import TypeVariable from '@nodes/TypeVariable';
 import type Expression from '../nodes/Expression';
-import type Locale from '../locale/Locale';
 import NoneLiteral from '../nodes/NoneLiteral';
 import NoneValue from '@values/NoneValue';
 import { Iteration } from './Iteration';
@@ -34,8 +33,9 @@ import InternalExpression from './InternalExpression';
 import ConversionException from '@values/ConversionException';
 import ExceptionValue from '@values/ExceptionValue';
 import SetType from '../nodes/SetType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapList(locales: Locale[]) {
+export default function bootstrapList(locales: Locales) {
     const ListTypeVarNames = getNameLocales(
         locales,
         (locale) => locale.basis.List.kind
diff --git a/src/basis/MapBasis.ts b/src/basis/MapBasis.ts
index 3e252412c..7a346248f 100644
--- a/src/basis/MapBasis.ts
+++ b/src/basis/MapBasis.ts
@@ -16,7 +16,6 @@ import TypeVariable from '@nodes/TypeVariable';
 import type Evaluation from '@runtime/Evaluation';
 import type Value from '@values/Value';
 import type Expression from '../nodes/Expression';
-import type Locale from '../locale/Locale';
 import { createFunction, createInputs } from '../locale/Locale';
 import { Iteration } from './Iteration';
 import NumberType from '../nodes/NumberType';
@@ -25,8 +24,9 @@ import TextType from '../nodes/TextType';
 import SetType from '../nodes/SetType';
 import ListType from '../nodes/ListType';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapMap(locales: Locale[]) {
+export default function bootstrapMap(locales: Locales) {
     const KeyTypeVariableNames = getNameLocales(
         locales,
         (locale) => locale.basis.Map.key
diff --git a/src/basis/NoneBasis.ts b/src/basis/NoneBasis.ts
index 6e1cbebf1..fbc6890d6 100644
--- a/src/basis/NoneBasis.ts
+++ b/src/basis/NoneBasis.ts
@@ -13,10 +13,11 @@ import type Expression from '../nodes/Expression';
 import type Locale from '../locale/Locale';
 import type { FunctionText, NameAndDoc } from '../locale/Locale';
 import TextType from '../nodes/TextType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapNone(locales: Locale[]) {
+export default function bootstrapNone(locales: Locales) {
     function createNoneFunction(
-        locales: Locale[],
+        locales: Locales,
         text: (locale: Locale) => FunctionText<NameAndDoc[]>,
         expression: (
             requestor: Expression,
diff --git a/src/basis/NumberBasis.ts b/src/basis/NumberBasis.ts
index f4ac84250..0f76f932a 100644
--- a/src/basis/NumberBasis.ts
+++ b/src/basis/NumberBasis.ts
@@ -25,8 +25,9 @@ import type Locale from '../locale/Locale';
 import type { FunctionText, NameAndDoc } from '../locale/Locale';
 import ListType from '../nodes/ListType';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapNumber(locales: Locale[]) {
+export default function bootstrapNumber(locales: Locales) {
     const subtractNames = getNameLocales(
         locales,
         (locale) => locale.basis.Number.function.subtract.inputs[0].names
diff --git a/src/basis/SetBasis.ts b/src/basis/SetBasis.ts
index 785066ff7..fb22bb246 100644
--- a/src/basis/SetBasis.ts
+++ b/src/basis/SetBasis.ts
@@ -15,7 +15,6 @@ import { getDocLocales } from '@locale/getDocLocales';
 import { getNameLocales } from '@locale/getNameLocales';
 import TypeVariable from '@nodes/TypeVariable';
 import type Expression from '../nodes/Expression';
-import type Locale from '../locale/Locale';
 import { createBind, createFunction, createInputs } from '../locale/Locale';
 import { Iteration } from './Iteration';
 import NumberType from '../nodes/NumberType';
@@ -23,8 +22,9 @@ import NumberValue from '@values/NumberValue';
 import ListType from '../nodes/ListType';
 import TextType from '../nodes/TextType';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapSet(locales: Locale[]) {
+export default function bootstrapSet(locales: Locales) {
     const SetTypeVariableNames = getNameLocales(
         locales,
         (locale) => locale.basis.Set.kind
diff --git a/src/basis/StructureBasis.ts b/src/basis/StructureBasis.ts
index 72d9d9b65..b615b60bb 100644
--- a/src/basis/StructureBasis.ts
+++ b/src/basis/StructureBasis.ts
@@ -2,7 +2,6 @@ import StructureDefinition from '@nodes/StructureDefinition';
 import Block, { BlockKind } from '@nodes/Block';
 import { getDocLocales } from '@locale/getDocLocales';
 import { getNameLocales } from '@locale/getNameLocales';
-import type Locale from '../locale/Locale';
 import { createBasisConversion, createBasisFunction } from './Basis';
 import BoolValue from '@values/BoolValue';
 import BooleanType from '../nodes/BooleanType';
@@ -13,8 +12,9 @@ import Value from '../values/Value';
 import type StructureValue from '../values/StructureValue';
 import TextType from '../nodes/TextType';
 import TextValue from '../values/TextValue';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapStructure(locales: Locale[]) {
+export default function bootstrapStructure(locales: Locales) {
     return StructureDefinition.make(
         getDocLocales(locales, (locale) => locale.basis.Structure.doc),
         getNameLocales(locales, (locale) => locale.basis.Structure.name),
diff --git a/src/basis/TableBasis.ts b/src/basis/TableBasis.ts
index 484ea5dce..406c00561 100644
--- a/src/basis/TableBasis.ts
+++ b/src/basis/TableBasis.ts
@@ -10,7 +10,6 @@ import type Names from '@nodes/Names';
 import { getInputLocales as getInputLocales } from '@locale/getInputLocales';
 import { getDocLocales } from '@locale/getDocLocales';
 import { getNameLocales } from '@locale/getNameLocales';
-import type Locale from '../locale/Locale';
 import type Type from '../nodes/Type';
 import TableType from '../nodes/TableType';
 import TableValue from '../values/TableValue';
@@ -25,8 +24,9 @@ import TextValue from '../values/TextValue';
 import TypeVariables from '../nodes/TypeVariables';
 import TypeVariable from '../nodes/TypeVariable';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapTable(locales: Locale[]) {
+export default function bootstrapTable(locales: Locales) {
     /** This type variable represents the StructureDefinition of a row. */
     const RowTypeVariable = new TypeVariable(
         getNameLocales(locales, (locale) => locale.basis.Table.row)
@@ -135,7 +135,7 @@ export default function bootstrapTable(locales: Locale[]) {
                     TableType.make(),
                     TextType.make(),
                     (requestor: Expression, table: TableValue) =>
-                        new TextValue(requestor, table.toWordplay([]))
+                        new TextValue(requestor, table.toWordplay(locales))
                 ),
             ],
             BlockKind.Structure
diff --git a/src/basis/TextBasis.ts b/src/basis/TextBasis.ts
index acbe2b425..0f6cc0bfa 100644
--- a/src/basis/TextBasis.ts
+++ b/src/basis/TextBasis.ts
@@ -17,8 +17,9 @@ import type Locale from '../locale/Locale';
 import type { FunctionText, NameAndDoc } from '../locale/Locale';
 import ListType from '../nodes/ListType';
 import AnyType from '../nodes/AnyType';
+import type Locales from '../locale/Locales';
 
-export default function bootstrapText(locales: Locale[]) {
+export default function bootstrapText(locales: Locales) {
     function createBinaryTextFunction<OutputType extends Value>(
         functionText: (locale: Locale) => FunctionText<NameAndDoc[]>,
         fun: (
diff --git a/src/components/annotations/Annotations.svelte b/src/components/annotations/Annotations.svelte
index de314b5e6..0f15bd36c 100644
--- a/src/components/annotations/Annotations.svelte
+++ b/src/components/annotations/Annotations.svelte
@@ -20,7 +20,7 @@
     import type Markup from '../../nodes/Markup';
     import concretize from '../../locale/concretize';
     import type Source from '../../nodes/Source';
-    import { locale, locales } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let project: Project;
     export let evaluator: Evaluator;
@@ -55,23 +55,25 @@
                     {
                         node: node,
                         element: view,
-                        messages: $evaluation?.step
-                            ? $locales.map((locale) =>
-                                  ($evaluation?.step as Step).getExplanations(
-                                      locale,
+                        messages: [
+                            $evaluation?.step
+                                ? ($evaluation?.step as Step).getExplanations(
+                                      $locales,
                                       evaluator
                                   )
-                              )
-                            : evaluator.steppedToNode() && evaluator.isDone()
-                            ? $locales.map((locale) =>
-                                  concretize(
-                                      locale,
-                                      locale.node.Program.unevaluated
+                                : evaluator.steppedToNode() &&
+                                  evaluator.isDone()
+                                ? concretize(
+                                      $locales,
+                                      $locales.get(
+                                          (l) => l.node.Program.unevaluated
+                                      )
                                   )
-                              )
-                            : $locales.map((locale) =>
-                                  concretize(locale, locale.node.Program.done)
-                              ),
+                                : concretize(
+                                      $locales,
+                                      $locales.get((l) => l.node.Program.done)
+                                  ),
+                        ],
                         kind: 'step',
                     },
                 ];
@@ -93,17 +95,17 @@
                                   {
                                       node: primary.node,
                                       element: getNodeView(primary.node),
-                                      messages: $locales.map((locale) =>
+                                      messages: [
                                           primary.explanation(
-                                              locale,
+                                              $locales,
                                               project.getNodeContext(
                                                   primary.node
                                               ) ??
                                                   project.getContext(
                                                       project.getMain()
                                                   )
-                                          )
-                                      ),
+                                          ),
+                                      ],
                                       kind: conflict.isMinor()
                                           ? ('minor' as const)
                                           : ('primary' as const),
@@ -116,14 +118,14 @@
                                   {
                                       node: secondary.node,
                                       element: getNodeView(secondary.node),
-                                      messages: $locales.map((locale) =>
+                                      messages: [
                                           secondary.explanation(
-                                              locale,
+                                              $locales,
                                               project.getNodeContext(
                                                   secondary.node
                                               )
-                                          )
-                                      ),
+                                          ),
+                                      ],
                                       kind: 'secondary' as const,
                                   },
                               ]
@@ -188,7 +190,7 @@
 </script>
 
 <!-- Render annotations by node -->
-<section aria-label={$locale.ui.conflicts.label}>
+<section aria-label={$locales.get((l) => l.ui.conflicts.label)}>
     {#each Array.from(annotationsByNode.values()) as annotations, index}
         <Annotation id={index} {annotations} />
     {/each}
diff --git a/src/components/app/CreatorView.svelte b/src/components/app/CreatorView.svelte
index c5a1a342c..63ad55bad 100644
--- a/src/components/app/CreatorView.svelte
+++ b/src/components/app/CreatorView.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
-    import type { Creator } from '../../db/CreatorDatabase';
-    import { locale } from '../../db/Database';
+    import type { Creator } from '@db/CreatorDatabase';
+    import { locales } from '@db/Database';
 
     export let creator: Creator | null;
     export let anonymize = true;
@@ -17,7 +17,7 @@
             : anonymize
             ? creator.email.split('@')[0].substring(0, 4)
             : creator.email
-        : $locale.ui.page.login.anonymous}</div
+        : $locales.get((l) => l.ui.page.login.anonymous)}</div
 >
 
 <style>
diff --git a/src/components/app/GalleryPreview.svelte b/src/components/app/GalleryPreview.svelte
index 753f9254a..c1d834d69 100644
--- a/src/components/app/GalleryPreview.svelte
+++ b/src/components/app/GalleryPreview.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import { goto } from '$app/navigation';
-    import { Projects, locale } from '../../db/Database';
+    import { Projects, locales } from '@db/Database';
     import type Gallery from '../../models/Gallery';
     import Link from './Link.svelte';
     import ProjectPreview from './ProjectPreview.svelte';
@@ -21,10 +21,13 @@
 
 <div class="gallery">
     <Link to={`gallery/${gallery.getID()}`}
-        ><Subheader>{gallery.getName($locale)}</Subheader></Link
+        ><Subheader>{gallery.getName($locales.getLocale())}</Subheader></Link
     >
     <MarkupHtmlView
-        markup={gallery.getDescription($locale).split('\n').join('\n\n')}
+        markup={gallery
+            .getDescription($locales.getLocale())
+            .split('\n')
+            .join('\n\n')}
     />
     <!-- We have to guard this since we haven't structured the project database to run server side fetches, so SvelteKit builds fail. -->
     {#if browser}
@@ -32,7 +35,11 @@
             {#each highlights as projectID, index}
                 <div class="highlight">
                     {#await Projects.get(projectID)}
-                        <Spinning label={$locale.ui.widget.loading.message} />
+                        <Spinning
+                            label={$locales.get(
+                                (l) => l.ui.widget.loading.message
+                            )}
+                        />
                     {:then project}
                         {#if project}
                             <ProjectPreview
diff --git a/src/components/app/Loading.svelte b/src/components/app/Loading.svelte
index 4741260d4..9c7b95f4c 100644
--- a/src/components/app/Loading.svelte
+++ b/src/components/app/Loading.svelte
@@ -1,12 +1,12 @@
 <script lang="ts">
     import { fade } from 'svelte/transition';
     import Spinning from './Spinning.svelte';
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
 </script>
 
 <div class="container" out:fade>
-    <Spinning label={$locale.ui.widget.loading.message} large />
-    <p>{$locale.ui.widget.loading.message}</p>
+    <Spinning label={$locales.get((l) => l.ui.widget.loading.message)} large />
+    <p>{$locales.get((l) => l.ui.widget.loading.message)}</p>
 </div>
 
 <style>
diff --git a/src/components/app/Page.svelte b/src/components/app/Page.svelte
index 008cba6bf..85c5d46f7 100644
--- a/src/components/app/Page.svelte
+++ b/src/components/app/Page.svelte
@@ -2,7 +2,7 @@
     import { goto } from '$app/navigation';
     import { page } from '$app/stores';
     import Settings from '../settings/Settings.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import Link from './Link.svelte';
 
     export let fullscreen = false;
@@ -25,10 +25,14 @@
         <slot />
     </main>
     <footer class:fullscreen>
-        <Link tip={$locale.ui.widget.home} to="/">🏠</Link>
-        <Link to="/learn">{$locale.ui.page.learn.header}</Link>
-        <Link to="/projects">{$locale.ui.page.projects.header}</Link>
-        <Link to="/galleries">{$locale.ui.page.galleries.header}</Link>
+        <Link tip={$locales.get((l) => l.ui.widget.home)} to="/">🏠</Link>
+        <Link to="/learn">{$locales.get((l) => l.ui.page.learn.header)}</Link>
+        <Link to="/projects"
+            >{$locales.get((l) => l.ui.page.projects.header)}</Link
+        >
+        <Link to="/galleries"
+            >{$locales.get((l) => l.ui.page.galleries.header)}</Link
+        >
         <Settings />
     </footer>
 </div>
diff --git a/src/components/app/ProjectPreviewSet.svelte b/src/components/app/ProjectPreviewSet.svelte
index ce057fab2..e4bb27c5c 100644
--- a/src/components/app/ProjectPreviewSet.svelte
+++ b/src/components/app/ProjectPreviewSet.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
     import type Project from '../../models/Project';
     import ProjectPreview from './ProjectPreview.svelte';
-    import { languages } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import getProjectLink from './getProjectLink';
     import Button from '../widgets/Button.svelte';
     import ConfirmButton from '../widgets/ConfirmButton.svelte';
@@ -27,7 +27,7 @@
 
     function sortProjects(projects: Project[]): Project[] {
         return projects.sort((a, b) =>
-            a.getName().localeCompare(b.getName(), $languages)
+            a.getName().localeCompare(b.getName(), $locales.getLanguages())
         );
     }
 </script>
diff --git a/src/components/app/Spinning.svelte b/src/components/app/Spinning.svelte
index db9382d17..a2fa4a4e7 100644
--- a/src/components/app/Spinning.svelte
+++ b/src/components/app/Spinning.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
 
-    export let label = $locale.ui.widget.loading.message;
+    export let label: string | undefined = undefined;
     export let large = false;
 </script>
 
@@ -11,7 +11,7 @@
     aria-live="assertive"
     aria-atomic="true"
     aria-relevant="all"
-    aria-label={label}
+    aria-label={label ?? $locales.get((l) => l.ui.widget.loading.message)}
 />
 
 <style>
diff --git a/src/components/app/Status.svelte b/src/components/app/Status.svelte
index 36db7f44f..fa42d7bfd 100644
--- a/src/components/app/Status.svelte
+++ b/src/components/app/Status.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { SaveStatus, locale } from '../../db/Database';
+    import { SaveStatus, locales } from '../../db/Database';
     import { status } from '../../db/Database';
     import { getUser } from '../project/Contexts';
 
@@ -8,10 +8,14 @@
 
 <div class="status {$status}">
     {$status === SaveStatus.Saved
-        ? `${$user === null ? $locale.ui.save.local : $locale.ui.save.saved} ✔`
+        ? `${
+              $user === null
+                  ? $locales.get((l) => l.ui.save.local)
+                  : $locales.get((l) => l.ui.save.saved)
+          } ✔`
         : $status === SaveStatus.Saving
-        ? `${$locale.ui.save.saving} …`
-        : `${$locale.ui.save.unsaved} ⨉`}
+        ? `${$locales.get((l) => l.ui.save.saving)} …`
+        : `${$locales.get((l) => l.ui.save.unsaved)} ⨉`}
 </div>
 
 <style>
diff --git a/src/components/app/TutorialView.svelte b/src/components/app/TutorialView.svelte
index 75b826a0e..1235912a7 100644
--- a/src/components/app/TutorialView.svelte
+++ b/src/components/app/TutorialView.svelte
@@ -16,7 +16,7 @@
     import PlayView from './PlayView.svelte';
     import Button from '../widgets/Button.svelte';
     import Source from '../../nodes/Source';
-    import { locale, locales, Projects } from '../../db/Database';
+    import { locales, Projects } from '@db/Database';
     import type Spaces from '../../parser/Spaces';
     import { toMarkup } from '../../parser/toMarkup';
     import MarkupHTMLView from '../concepts/MarkupHTMLView.svelte';
@@ -130,10 +130,17 @@
     )
         initialProject = Project.make(
             progress.getProjectID(),
-            scene ? scene.title : act ? act.title : $locale.wordplay,
-            new Source($locale.term.start, source),
+            scene
+                ? scene.title
+                : act
+                ? act.title
+                : $locales.getLocale().wordplay,
+            new Source(
+                $locales.get((l) => l.term.start),
+                source
+            ),
             [],
-            $locales,
+            $locales.getLocales(),
             $user?.uid ?? null,
             [],
             false,
@@ -218,13 +225,13 @@
         <Header block={false}>Learn</Header>
         <nav>
             <Button
-                tip={$locale.ui.page.learn.button.previous}
+                tip={$locales.get((l) => l.ui.page.learn.button.previous)}
                 action={() => navigate(progress.previousPause() ?? progress)}
                 active={progress.previousPause() !== undefined}
                 bind:view={previousButton}>⇦</Button
             >
             <Button
-                tip={$locale.ui.page.learn.button.next}
+                tip={$locales.get((l) => l.ui.page.learn.button.next)}
                 action={() => navigate(progress.nextPause() ?? progress)}
                 active={progress.nextPause() !== undefined}
                 bind:view={nextButton}>⇨</Button
@@ -270,15 +277,17 @@
         <div role="article" class="dialog">
             <div class="turns" aria-live="assertive">
                 {#if act === undefined}
-                    <div class="title play">{$locale.wordplay}</div>
+                    <div class="title play"
+                        >{$locales.get((l) => l.wordplay)}</div
+                    >
                 {:else if scene === undefined}
                     <div class="title act"
-                        >{$locale.term.act}
+                        >{$locales.get((l) => l.term.act)}
                         {progress.act}<p><em>{act.title}</em></p></div
                     >
                 {:else if dialog === undefined}
                     <div class="title scene"
-                        >{$locale.term.scene}
+                        >{$locales.get((l) => l.term.scene)}
                         {progress.scene}<p><em>{scene.title}</em></p
                         >{#if scene.subtitle}<em>{scene.subtitle}</em>{/if}</div
                     >
diff --git a/src/components/concepts/BindConceptView.svelte b/src/components/concepts/BindConceptView.svelte
index 071d1e516..fcc881177 100644
--- a/src/components/concepts/BindConceptView.svelte
+++ b/src/components/concepts/BindConceptView.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
     import type BindConcept from '@concepts/BindConcept';
     import Speech from '../lore/Speech.svelte';
-    import { locales } from '../../db/Database';
+    import { locales } from '@db/Database';
     import MarkupHTMLView from './MarkupHTMLView.svelte';
     import RootView from '../project/RootView.svelte';
 
@@ -10,14 +10,12 @@
 
 <Speech glyph={concept.getGlyphs($locales)} below={true}>
     <svelte:fragment slot="content">
-        {#each $locales as trans}
-            {@const markup = concept.getDocs(trans)}
-            {#if markup}
-                <MarkupHTMLView {markup} />
-            {:else}
-                {trans.ui.docs.nodoc}
-            {/if}
-        {/each}
+        {@const markup = concept.getDocs($locales)}
+        {#if markup}
+            <MarkupHTMLView {markup} />
+        {:else}
+            {$locales.get((l) => l.ui.docs.nodoc)}
+        {/if}
     </svelte:fragment>
     <svelte:fragment slot="aside"
         >{#if concept.bind.type}• <RootView
diff --git a/src/components/concepts/ConceptLinkUI.svelte b/src/components/concepts/ConceptLinkUI.svelte
index f9edd0896..f79824840 100644
--- a/src/components/concepts/ConceptLinkUI.svelte
+++ b/src/components/concepts/ConceptLinkUI.svelte
@@ -2,7 +2,7 @@
     import { getConceptIndex, getConceptPath } from '../project/Contexts';
     import ConceptLink from '@nodes/ConceptLink';
     import Concept from '@concepts/Concept';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import TutorialHighlight from '../app/TutorialHighlight.svelte';
     import type ConceptRef from '../../locale/ConceptRef';
     import Button from '../widgets/Button.svelte';
@@ -41,7 +41,7 @@
                 if (concept && names.length > 1) {
                     const subConcept = Array.from(
                         concept.getSubConcepts()
-                    ).find((sub) => sub.hasName(names[1], $locale));
+                    ).find((sub) => sub.hasName(names[1], $locales));
                     if (subConcept !== undefined) concept = subConcept;
                     else if (concept.affiliation !== undefined) {
                         const structure = $index.getStructureConcept(
@@ -50,7 +50,7 @@
                         if (structure) {
                             const subConcept = Array.from(
                                 structure.getSubConcepts()
-                            ).find((sub) => sub.hasName(names[1], $locale));
+                            ).find((sub) => sub.hasName(names[1], $locales));
                             if (subConcept) {
                                 container = concept;
                                 concept = subConcept;
@@ -66,8 +66,8 @@
     let symbolicName: string;
     $: {
         if (concept) {
-            symbolicName = concept.getName($locale, true);
-            longName = concept.getName($locale, false);
+            symbolicName = concept.getName($locales, true);
+            longName = concept.getName($locales, false);
         }
     }
 
@@ -88,7 +88,11 @@
 
 {#if concept}<Button
         action={navigate}
-        tip={concretize($locale, $locale.ui.docs.link, longName).toText()}
+        tip={concretize(
+            $locales,
+            $locales.get((l) => l.ui.docs.link),
+            longName
+        ).toText()}
         ><span class="conceptlink interactive"
             >{#if label}{label}{:else}<span class="long">{longName}</span
                 >{#if symbolicName !== longName && symbolic}<sub
@@ -98,7 +102,7 @@
     >{:else if ui}<TutorialHighlight
     />{:else if link instanceof ConceptLink}<span
         >{#if container}{container.getName(
-                $locale,
+                $locales,
                 false
             )}{/if}{link.concept.getText()}</span
     >{/if}
diff --git a/src/components/concepts/ConceptView.svelte b/src/components/concepts/ConceptView.svelte
index 803213744..ad779fa78 100644
--- a/src/components/concepts/ConceptView.svelte
+++ b/src/components/concepts/ConceptView.svelte
@@ -4,12 +4,7 @@
     import CodeView from './CodeView.svelte';
     import MarkupHTMLView from './MarkupHTMLView.svelte';
     import Speech from '../lore/Speech.svelte';
-    import {
-        Locales,
-        animationDuration,
-        locale,
-        locales,
-    } from '../../db/Database';
+    import { Locales, animationDuration, locales } from '../../db/Database';
     import type Type from '../../nodes/Type';
     import concretize from '../../locale/concretize';
     import type TypeVariables from '../../nodes/TypeVariables';
@@ -27,10 +22,10 @@
 
     /** See if the concept corresponds to a character name, and find that character name in the locale's tutorial. */
     let tutorialURL: string | undefined = undefined;
-    $: getConceptURL($locale).then((url) => (tutorialURL = url));
+    $: getConceptURL($locales.getLocale()).then((url) => (tutorialURL = url));
 
     async function getConceptURL(locale: Locale) {
-        const character = concept.getCharacter(locale);
+        const character = concept.getCharacter($locales);
         if (character) {
             const tutorial = await Locales.getTutorial(
                 locale.language,
@@ -60,25 +55,29 @@
     {#if header}
         <CodeView {concept} {type} {node} describe={false} />
         {#if tutorialURL}
-            <Link external to={tutorialURL}>{$locale.ui.docs.learn}</Link>
+            <Link external to={tutorialURL}
+                >{$locales.get((l) => l.ui.docs.learn)}</Link
+            >
         {/if}
     {/if}
 
     <Speech glyph={concept.getGlyphs($locales)} below={header}>
         <svelte:fragment slot="content">
-            {@const markup = concept.getDocs($locale)}
+            {@const markup = concept.getDocs($locales)}
             {#if markup}
                 <MarkupHTMLView {markup} />
             {:else}
-                {concretize($locale, $locale.ui.docs.nodoc)}
+                {concretize(
+                    $locales,
+                    $locales.get((l) => l.ui.docs.nodoc)
+                )}
             {/if}
         </svelte:fragment>
         <svelte:fragment slot="aside"
             >{#if variables}{#each variables.variables as variable, index}{#if index > 0},
-                    {/if}{@const name =
-                        variable.names.getPreferredName(
-                            $locale
-                        )}{#if name}<RootView
+                    {/if}{@const name = variable.names.getPreferredName(
+                        $locales.getLocales()
+                    )}{#if name}<RootView
                             localized
                             node={name.withoutLanguage()}
                         />{/if}{/each}{/if}</svelte:fragment
diff --git a/src/components/concepts/Documentation.svelte b/src/components/concepts/Documentation.svelte
index e71d4a38b..4c4de623a 100644
--- a/src/components/concepts/Documentation.svelte
+++ b/src/components/concepts/Documentation.svelte
@@ -28,7 +28,7 @@
     import { tick } from 'svelte';
     import TextField from '../widgets/TextField.svelte';
     import type Project from '../../models/Project';
-    import { Projects, locale, locales } from '../../db/Database';
+    import { Projects, locales } from '../../db/Database';
     import getScrollParent from '../util/getScrollParent';
     import Note from '../widgets/Note.svelte';
     import ConceptLinkUI from './ConceptLinkUI.svelte';
@@ -115,7 +115,7 @@
         currentConcept === undefined
             ? undefined
             : currentConcept
-                  .getDocs($locale)
+                  .getDocs($locales)
                   ?.nodes()
                   .filter(
                       (n): n is ConceptLink =>
@@ -179,17 +179,21 @@
 <div class="header">
     <TextField
         placeholder={'🔍'}
-        description={$locale.ui.docs.field.search}
+        description={$locales.get((l) => l.ui.docs.field.search)}
         bind:text={query}
         fill
     />
     {#if currentConcept}
         <span class="path">
             {#if $path.length > 1}
-                <Button tip={$locale.ui.docs.button.home} action={home}
-                    >⇤</Button
+                <Button
+                    tip={$locales.get((l) => l.ui.docs.button.home)}
+                    action={home}>⇤</Button
                 >{/if}
-            <Button tip={$locale.ui.docs.button.back} action={back}>←</Button>
+            <Button
+                tip={$locales.get((l) => l.ui.docs.button.back)}
+                action={back}>←</Button
+            >
             {#each $path as concept, index}{#if index > 0}…{/if}<ConceptLinkUI
                     link={concept}
                     symbolic={false}
@@ -200,7 +204,7 @@
 </div>
 <section
     class="palette"
-    aria-label={$locale.ui.docs.label}
+    aria-label={$locales.get((l) => l.ui.docs.label)}
     on:pointerup={handleDrop}
     bind:this={view}
 >
@@ -211,7 +215,7 @@
                 <p class="result">
                     <CodeView {concept} node={concept.getRepresentation()} />
                     <!-- Show the matching text -->
-                    {#if text.length > 1 || concept.getName($locale, false) !== text[0][0]}
+                    {#if text.length > 1 || concept.getName($locales, false) !== text[0][0]}
                         <div class="matches">
                             {#each text as [match, index]}
                                 <Note
@@ -272,41 +276,41 @@
             <!-- Home page is default. -->
         {:else if $index}
             <ConceptsView
-                category={$locale.term.project}
+                category={$locales.get((l) => l.term.project)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Project)}
             />
             <ConceptsView
-                category={$locale.term.value}
+                category={$locales.get((l) => l.term.value)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Value)}
             />
             <ConceptsView
-                category={$locale.term.evaluate}
+                category={$locales.get((l) => l.term.evaluate)}
                 concepts={$index.getPrimaryConceptsWithPurpose(
                     Purpose.Evaluate
                 )}
             />
             <ConceptsView
-                category={$locale.term.bind}
+                category={$locales.get((l) => l.term.bind)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Bind)}
             />
             <ConceptsView
-                category={$locale.term.decide}
+                category={$locales.get((l) => l.term.decide)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Decide)}
             />
             <ConceptsView
-                category={$locale.term.input}
+                category={$locales.get((l) => l.term.input)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Input)}
             />
             <ConceptsView
-                category={$locale.term.output}
+                category={$locales.get((l) => l.term.output)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Output)}
             />
             <ConceptsView
-                category={$locale.term.type}
+                category={$locales.get((l) => l.term.type)}
                 concepts={$index.getPrimaryConceptsWithPurpose(Purpose.Type)}
             />
             <ConceptsView
-                category={$locale.term.document}
+                category={$locales.get((l) => l.term.document)}
                 concepts={$index.getPrimaryConceptsWithPurpose(
                     Purpose.Document
                 )}
diff --git a/src/components/concepts/ExampleUI.svelte b/src/components/concepts/ExampleUI.svelte
index c94ef8b21..102262fe8 100644
--- a/src/components/concepts/ExampleUI.svelte
+++ b/src/components/concepts/ExampleUI.svelte
@@ -24,7 +24,7 @@
         'example',
         new Source('example', [example.program, spaces]),
         [],
-        $locales
+        $locales.getLocales()
     );
     let value: Value | undefined = undefined;
     let stage: Stage | undefined = undefined;
diff --git a/src/components/concepts/StructureConceptView.svelte b/src/components/concepts/StructureConceptView.svelte
index 00c9ba3b6..132e7e6fd 100644
--- a/src/components/concepts/StructureConceptView.svelte
+++ b/src/components/concepts/StructureConceptView.svelte
@@ -5,7 +5,7 @@
     import ConceptView from './ConceptView.svelte';
     import type BindConcept from '@concepts/BindConcept';
     import { onMount } from 'svelte';
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
 
     export let concept: StructureConcept;
     export let subconcept: BindConcept | undefined = undefined;
@@ -33,14 +33,14 @@
     {/if} -->
 
     {#if concept.inter.length > 0}
-        <h2>{$locale.ui.docs.header.interfaces}</h2>
+        <h2>{$locales.get((l) => l.ui.docs.header.interfaces)}</h2>
         {#each concept.inter as inter}
             <CodeView concept={inter} node={inter.getRepresentation()} />
         {/each}
     {/if}
 
     {#if concept.inputs.length > 0}
-        <h2>{$locale.ui.docs.header.inputs}</h2>
+        <h2>{$locales.get((l) => l.ui.docs.header.inputs)}</h2>
         {#each concept.inputs as bind, index}
             <div id="input-{index}">
                 <BindConceptView concept={bind} />
@@ -49,7 +49,7 @@
     {/if}
 
     {#if concept.properties.length > 0}
-        <h2>{$locale.ui.docs.header.properties}</h2>
+        <h2>{$locales.get((l) => l.ui.docs.header.properties)}</h2>
         {#each concept.properties as bind, index}
             <div id="property-{index + concept.inputs.length}">
                 <BindConceptView concept={bind} />
@@ -58,14 +58,14 @@
     {/if}
 
     {#if concept.functions.length > 0}
-        <h2>{$locale.ui.docs.header.functions}</h2>
+        <h2>{$locales.get((l) => l.ui.docs.header.functions)}</h2>
         {#each concept.functions as fun}
             <CodeView node={fun.getRepresentation()} concept={fun} />
         {/each}
     {/if}
 
     {#if concept.conversions.length > 0}
-        <h2>{$locale.ui.docs.header.conversions}</h2>
+        <h2>{$locales.get((l) => l.ui.docs.header.conversions)}</h2>
         {#each concept.conversions as conversion}
             <CodeView
                 node={conversion.getRepresentation()}
diff --git a/src/components/editor/CaretView.svelte b/src/components/editor/CaretView.svelte
index 9cf1c0c01..6ddd97237 100644
--- a/src/components/editor/CaretView.svelte
+++ b/src/components/editor/CaretView.svelte
@@ -20,12 +20,10 @@
     import type Source from '@nodes/Source';
     import Node from '@nodes/Node';
     import Token from '../../nodes/Token';
-    import { getLanguageDirection } from '../../locale/LanguageCode';
     import {
         animationDuration,
         blocks,
-        locale,
-        writingDirection,
+        locales,
         writingLayout,
     } from '../../db/Database';
     import type Caret from '../../edit/Caret';
@@ -45,7 +43,7 @@
     // The current token we're on.
     $: token = caret?.getToken();
 
-    $: leftToRight = getLanguageDirection($locale.language) === 'ltr';
+    $: leftToRight = $locales.getDirection() === 'ltr';
 
     // The index we should render
     let caretIndex: number | undefined = undefined;
@@ -65,7 +63,7 @@
         if (
             token !== undefined &&
             caret !== undefined &&
-            $writingDirection &&
+            $locales.getDirection() &&
             $writingLayout
         ) {
             // Get some of the token's metadata
diff --git a/src/components/editor/Editor.svelte b/src/components/editor/Editor.svelte
index 656ef6f22..9a69c7907 100644
--- a/src/components/editor/Editor.svelte
+++ b/src/components/editor/Editor.svelte
@@ -75,9 +75,7 @@
         Projects,
         animationFactor,
         blocks,
-        locale,
         locales,
-        writingDirection,
         writingLayout,
     } from '../../db/Database';
     import Button from '../widgets/Button.svelte';
@@ -457,12 +455,7 @@
     }
 
     // Update the highlights when any of these stores values change
-    $: if (
-        $nodeConflicts &&
-        $evaluation &&
-        $writingLayout &&
-        $writingDirection
-    ) {
+    $: if ($nodeConflicts && $evaluation && $writingLayout && $locales) {
         tick().then(() =>
             highlights.set(
                 getHighlights(
@@ -484,7 +477,7 @@
     $: outlines = updateOutlines(
         $highlights,
         $writingLayout === 'horizontal-tb',
-        $writingDirection === 'rtl' || $writingLayout === 'vertical-rl',
+        $locales.getDirection() === 'rtl' || $writingLayout === 'vertical-rl',
         getNodeView
     );
 
@@ -493,7 +486,8 @@
         updateOutlines(
             $highlights,
             $writingLayout === 'horizontal-tb',
-            $writingDirection === 'rtl' || $writingLayout === 'vertical-rl',
+            $locales.getDirection() === 'rtl' ||
+                $writingLayout === 'vertical-rl',
             getNodeView
         );
 
@@ -887,7 +881,7 @@
                 ? Math.round(
                       Math.abs(
                           event.clientX -
-                              ($writingDirection === 'ltr'
+                              ($locales.getDirection() === 'ltr'
                                   ? spaceBounds.left
                                   : spaceBounds.right)
                       ) / spaceWidth
@@ -1064,7 +1058,11 @@
         const position = node ?? $caret.position;
 
         // Get the unique valid edits at the caret.
-        const revisions = getEditsAt(project, $caret.withPosition(position));
+        const revisions = getEditsAt(
+            project,
+            $caret.withPosition(position),
+            $locales
+        );
 
         // Set the menu.
         if ($concepts)
@@ -1342,10 +1340,10 @@
     class:dragging={dragCandidate !== undefined || $dragged !== undefined}
     data-uiid="editor"
     role="application"
-    aria-label={`${$locale.ui.source.label} ${source.getPreferredName(
-        $locales
+    aria-label={`${$locales.get((l) => l.ui.source.label)} ${$locales.getName(
+        source.names
     )}`}
-    style:direction={$writingDirection}
+    style:direction={$locales.getDirection()}
     style:writing-mode={$writingLayout}
     data-id={source.id}
     bind:this={editor}
@@ -1434,10 +1432,10 @@
                     />{/if}
                 <!-- Show the node's label and type -->
                 {$caret.position.getLabel(
-                    $locale
+                    $locales
                 )}{#if caretExpressionType}&nbsp;{TYPE_SYMBOL}&nbsp;{caretExpressionType.toWordplay(
                         undefined,
-                        $locale
+                        $locales.getLocale()
                     )}{/if}
                 <PlaceholderView position={$caret.position} />{/if}</div
         >
@@ -1448,7 +1446,7 @@
     {#if project.getSupplements().length > 0}
         <div class="output-preview-container">
             <Button
-                tip={$locale.ui.source.button.selectOutput}
+                tip={$locales.get((l) => l.ui.source.button.selectOutput)}
                 active={!selected}
                 action={() => dispatch('preview')}
                 scale={false}
diff --git a/src/components/editor/EditorHelp.svelte b/src/components/editor/EditorHelp.svelte
index 31298accd..e2e7138c8 100644
--- a/src/components/editor/EditorHelp.svelte
+++ b/src/components/editor/EditorHelp.svelte
@@ -3,13 +3,14 @@
     import Glyphs from '../../lore/Glyphs';
     import { ShowMenu, toShortcut } from './util/Commands';
     import { fade } from 'svelte/transition';
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
     import { docToMarkup } from '@locale/Locale';
     import MarkupHTMLView from '@components/concepts/MarkupHTMLView.svelte';
 
-    $: markup = docToMarkup($locale.ui.source.empty).concretize($locale, [
-        toShortcut(ShowMenu),
-    ]);
+    $: markup = docToMarkup($locales.get((l) => l.ui.source.empty)).concretize(
+        $locales,
+        [toShortcut(ShowMenu)]
+    );
 </script>
 
 {#if markup}
diff --git a/src/components/editor/ExpressionPlaceholderView.svelte b/src/components/editor/ExpressionPlaceholderView.svelte
index c89649ab4..628494827 100644
--- a/src/components/editor/ExpressionPlaceholderView.svelte
+++ b/src/components/editor/ExpressionPlaceholderView.svelte
@@ -3,22 +3,17 @@
 <script lang="ts">
     import type ExpressionPlaceholder from '@nodes/ExpressionPlaceholder';
     import NodeView from './NodeView.svelte';
-    import {
-        getCaret,
-        getLocales,
-        getProject,
-        getRoot,
-    } from '../project/Contexts';
+    import { getCaret, getProject, getRoot } from '../project/Contexts';
     import RootView from '../project/RootView.svelte';
     import UnknownType from '../../nodes/UnknownType';
     import PlaceholderView from './PlaceholderView.svelte';
+    import { locales } from '../../db/Database';
 
     export let node: ExpressionPlaceholder;
 
     const project = getProject();
     const root = getRoot();
     const caret = getCaret();
-    const locale = getLocales();
 
     $: inferredType = $project
         ? node.getType($project.getNodeContext(node))
@@ -33,7 +28,7 @@
             if (parent)
                 placeholder = parent.getChildPlaceholderLabel(
                     node,
-                    locale[0],
+                    $locales,
                     context,
                     $root
                 );
diff --git a/src/components/editor/GlyphChooser.svelte b/src/components/editor/GlyphChooser.svelte
index deef4cf27..32b21bc57 100644
--- a/src/components/editor/GlyphChooser.svelte
+++ b/src/components/editor/GlyphChooser.svelte
@@ -5,7 +5,7 @@
     import Button from '../widgets/Button.svelte';
     import TextField from '../widgets/TextField.svelte';
     import TokenView from './TokenView.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import Commands, { Category } from './util/Commands';
     import CommandButton from '../widgets/CommandButton.svelte';
     import concretize from '../../locale/concretize';
@@ -45,7 +45,7 @@
 <section class:expanded class="directory" data-uiid="directory">
     <TextField
         placeholder="🔍"
-        description={$locale.ui.source.cursor.search}
+        description={$locales.get((l) => l.ui.source.cursor.search)}
         bind:text={query}
     />
     <div class="matches">
@@ -59,8 +59,8 @@
         {:else}
             {#each results as glyph}<Button
                     tip={concretize(
-                        $locale,
-                        $locale.ui.source.cursor.insertSymbol,
+                        $locales,
+                        $locales.get((l) => l.ui.source.cursor.insertSymbol),
                         glyph
                     ).toText()}
                     action={() => insert(glyph)}
@@ -69,7 +69,7 @@
         {/if}
     </div>
     <Toggle
-        tips={$locale.ui.source.toggle.glyphs}
+        tips={$locales.get((l) => l.ui.source.toggle.glyphs)}
         on={expanded}
         toggle={() => (expanded = !expanded)}>{expanded ? '–' : '+'}</Toggle
     >
diff --git a/src/components/editor/Menu.svelte b/src/components/editor/Menu.svelte
index 45dad5bf3..db6797d7c 100644
--- a/src/components/editor/Menu.svelte
+++ b/src/components/editor/Menu.svelte
@@ -5,7 +5,7 @@
     import type Menu from './util/Menu';
     import { getConceptIndex } from '../project/Contexts';
     import Speech from '../lore/Speech.svelte';
-    import { locale, locales } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import MarkupHTMLView from '../concepts/MarkupHTMLView.svelte';
     import Glyphs from '../../lore/Glyphs';
     import { RevisionSet } from './util/Menu';
@@ -61,7 +61,7 @@
         $index && newParent && newNode
             ? $index.getRelevantConcept(evaluateBind ?? newNode)
             : undefined;
-    $: selectedDocs = selectedConcept?.getDocs($locale);
+    $: selectedDocs = selectedConcept?.getDocs($locales);
 
     /* When the selection changes, scroll it's corresponding view and focus it. */
     let revisionViews: HTMLElement[] = [];
@@ -110,7 +110,9 @@
                                   node instanceof Token &&
                                   node.getText().startsWith(event.key)
                           )
-                    : $locale.term[revision.purpose].startsWith(event.key)
+                    : $locales
+                          .get((l) => l.term[revision.purpose])
+                          .startsWith(event.key)
             );
             if (match)
                 menu = menu.inSubmenu()
@@ -132,7 +134,7 @@
         role="menu"
         tabindex="-1"
         aria-orientation="vertical"
-        aria-label={$locale.ui.source.menu.label}
+        aria-label={$locales.get((l) => l.ui.source.menu.label)}
         aria-activedescendant="menuitem-{menu.inSubmenu()
             ? menu.getSelectionIndex()[1]
             : menu.getSelectionIndex()[0]}"
@@ -144,7 +146,7 @@
                 class="revision"
                 tabindex="-1"
                 id="menuitem--1"
-                aria-label={$locale.ui.source.menu.back}
+                aria-label={$locales.get((l) => l.ui.source.menu.back)}
                 class:selected={menu.onBack()}
                 bind:this={revisionViews[-1]}
                 on:pointerdown|stopPropagation={() =>
@@ -159,9 +161,9 @@
                 aria-label={entry instanceof Revision
                     ? entry
                           .getEditedNode($locales)[0]
-                          .getDescription(concretize, $locale, entry.context)
+                          .getDescription(concretize, $locales, entry.context)
                           .toText()
-                    : $locale.term[entry.purpose]}
+                    : $locales.getLocale().term[entry.purpose]}
                 class={`revision ${
                     itemIndex === menu.getSelectionID() ? 'selected' : ''
                 } ${entry instanceof RevisionSet ? 'submenu' : ''}`}
@@ -182,14 +184,18 @@
                         {/if}
                     {:else}
                         <MarkupHTMLView
-                            markup={revision.getDescription($locale)}
+                            markup={revision.getDescription($locales)}
                         />
                     {/if}
                 {:else if entry instanceof RevisionSet}
                     <MarkupHTMLView
                         markup={concretize(
-                            $locale,
-                            `/${$locale.term[entry.purpose]}…/`
+                            $locales,
+                            `/${$locales.get((l) =>
+                                entry instanceof RevisionSet
+                                    ? l.term[entry.purpose]
+                                    : ''
+                            )}…/`
                         )}
                     />
                 {/if}
@@ -204,7 +210,7 @@
             <Speech glyph={selectedConcept ?? Glyphs.Program} below>
                 <svelte:fragment slot="content">
                     <MarkupHTMLView
-                        markup={selectedRevision.getDescription($locale)}
+                        markup={selectedRevision.getDescription($locales)}
                     />
                     {#if selectedDocs}
                         <MarkupHTMLView markup={selectedDocs} />
diff --git a/src/components/editor/NodeSequenceView.svelte b/src/components/editor/NodeSequenceView.svelte
index b6f4350aa..739dc86d8 100644
--- a/src/components/editor/NodeSequenceView.svelte
+++ b/src/components/editor/NodeSequenceView.svelte
@@ -9,7 +9,7 @@
     import { getCaret } from '../project/Contexts';
     import NodeView from './NodeView.svelte';
     import Button from '../widgets/Button.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let nodes: Node[];
     export let elide = false;
@@ -77,13 +77,13 @@
 
 {#if hiddenBefore > 0}
     <Button
-        tip={$locale.ui.source.button.expandSequence}
+        tip={$locales.get((l) => l.ui.source.button.expandSequence)}
         action={() => (elide = false)}
         ><span class="count">… {hiddenBefore}</span></Button
     >{/if}{#each visible as node}<NodeView
         {node}
     />{/each}{#if hiddenAfter > 0}<Button
-        tip={$locale.ui.source.button.expandSequence}
+        tip={$locales.get((l) => l.ui.source.button.expandSequence)}
         action={() => (elide = false)}
         ><span class="count">… {hiddenAfter}</span></Button
     >{/if}
diff --git a/src/components/editor/NodeView.svelte b/src/components/editor/NodeView.svelte
index ad719967f..d555cd33b 100644
--- a/src/components/editor/NodeView.svelte
+++ b/src/components/editor/NodeView.svelte
@@ -7,7 +7,6 @@
         getHidden,
         getInsertionPoint,
         getSpace,
-        getLocales,
     } from '../project/Contexts';
     import getNodeView from './util/nodeToView';
     import Expression, { ExpressionKind } from '@nodes/Expression';
@@ -16,20 +15,19 @@
     import Space from './Space.svelte';
     import Token from '../../nodes/Token';
     import concretize from '../../locale/concretize';
-    import { blocks } from '../../db/Database';
+    import { blocks, locales } from '../../db/Database';
 
     export let node: Node | undefined;
     export let small = false;
 
     const evaluation = getEvaluation();
-    const locales = getLocales();
 
     $: description =
-        node && $evaluation && locales && locales.length > 0
+        node && $evaluation
             ? node
                   .getDescription(
                       concretize,
-                      locales[0],
+                      $locales,
                       $evaluation.evaluator.project.getNodeContext(node)
                   )
                   .toText()
diff --git a/src/components/editor/StructureTypeView.svelte b/src/components/editor/StructureTypeView.svelte
index 369ece5c8..9fb70d62c 100644
--- a/src/components/editor/StructureTypeView.svelte
+++ b/src/components/editor/StructureTypeView.svelte
@@ -9,9 +9,7 @@
     export let node: StructureType;
 
     // Choose what name to render based on the preferred languages.
-    $: name = new NameToken(
-        node.structure.names.getPreferredNameString($locales)
-    );
+    $: name = new NameToken($locales.getName(node.structure.names));
 </script>
 
 <NodeView node={name} />
diff --git a/src/components/editor/TokenView.svelte b/src/components/editor/TokenView.svelte
index 41f8b1ed8..d55923082 100644
--- a/src/components/editor/TokenView.svelte
+++ b/src/components/editor/TokenView.svelte
@@ -9,7 +9,7 @@
         getHidden,
     } from '../project/Contexts';
     import TokenCategories from './TokenCategories';
-    import { locale, locales } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let node: Token;
 
@@ -25,7 +25,7 @@
     // See if this is a placeholder that should be rendered differently.
     $: placeholder =
         $project && $root && context
-            ? node.getPlaceholder($root, context, $locale)
+            ? node.getPlaceholder($root, context, $locales)
             : undefined;
 
     // True if the caret is "on" this token.
@@ -47,7 +47,7 @@
             ? node.getText()
             : node.localized(
                   $caret === undefined || !$caret.isIn(node, true),
-                  $locales,
+                  $locales.getLocales(),
                   $root,
                   context
               );
diff --git a/src/components/editor/TypeView.svelte b/src/components/editor/TypeView.svelte
index 70968231e..9029f57fa 100644
--- a/src/components/editor/TypeView.svelte
+++ b/src/components/editor/TypeView.svelte
@@ -4,7 +4,7 @@
 <script lang="ts">
     import concretize from '../../locale/concretize';
     import { getProject, getRoot } from '../project/Contexts';
-    import { locale } from '../../db/Database';
+    import { locales } from '@db/Database';
     import MarkupHtmlView from '../concepts/MarkupHTMLView.svelte';
     import type Type from '../../nodes/Type';
 
@@ -21,7 +21,7 @@
 
 <span class="TypeView"
     >{#if context}<MarkupHtmlView
-            markup={node.getDescription(concretize, $locale, context)}
+            markup={node.getDescription(concretize, $locales, context)}
         />{:else}{node.toWordplay()}{/if}</span
 >
 
diff --git a/src/components/editor/util/Menu.ts b/src/components/editor/util/Menu.ts
index 9dc31488e..e1ff1c52a 100644
--- a/src/components/editor/util/Menu.ts
+++ b/src/components/editor/util/Menu.ts
@@ -4,7 +4,7 @@ import type { Edit } from './Commands';
 import type Purpose from '@concepts/Purpose';
 import type ConceptIndex from '@concepts/ConceptIndex';
 import Literal from '@nodes/Literal';
-import type Locale from '../../../locale/Locale';
+import type Locales from '@locale/Locales';
 
 export type MenuSelection = [number, number | undefined];
 export type MenuOrganization = (Revision | RevisionSet)[];
@@ -76,8 +76,9 @@ export default class Menu {
             // RevisionSets are organized alphabetically by locale.
             const priority = this.revisions.filter(
                 (revision) =>
-                    revision.isCompletion() ||
-                    revision.getNewNode([]) instanceof Literal
+                    revision.isCompletion(this.concepts.locales) ||
+                    revision.getNewNode(this.concepts.locales) instanceof
+                        Literal
             );
             const removals = this.revisions.filter((revision) =>
                 revision.isRemoval()
@@ -88,7 +89,7 @@ export default class Menu {
             );
             const kinds: Map<Purpose, Revision[]> = new Map();
             for (const other of others) {
-                const node = other.getNewNode([]);
+                const node = other.getNewNode(this.concepts.locales);
                 const purpose =
                     node === undefined
                         ? undefined
@@ -276,7 +277,7 @@ export default class Menu {
             : this;
     }
 
-    doEdit(locales: Locale[], revision: Revision | RevisionSet | undefined) {
+    doEdit(locales: Locales, revision: Revision | RevisionSet | undefined) {
         if (revision === undefined) return this.action(undefined);
         return revision
             ? this.action(
diff --git a/src/components/evaluator/Controls.svelte b/src/components/evaluator/Controls.svelte
index 60111089d..67344490a 100644
--- a/src/components/evaluator/Controls.svelte
+++ b/src/components/evaluator/Controls.svelte
@@ -2,7 +2,7 @@
     import Switch from '../widgets/Switch.svelte';
     import { getEvaluation } from '../project/Contexts';
     import type Evaluator from '@runtime/Evaluator';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import CommandButton from '../widgets/CommandButton.svelte';
     import {
         Pause,
@@ -28,8 +28,8 @@
 <Switch
     on={$evaluation?.playing === true}
     toggle={(play) => (play ? evaluator.play() : evaluator.pause())}
-    offTip={Pause.description($locale)}
-    onTip={Play.description($locale)}
+    offTip={$locales.get(Pause.description)}
+    onTip={$locales.get(Play.description)}
     offLabel={Pause.symbol}
     onLabel={Play.symbol}
     uiid="playToggle"
diff --git a/src/components/evaluator/Timeline.svelte b/src/components/evaluator/Timeline.svelte
index 3e404412c..8e118d13b 100644
--- a/src/components/evaluator/Timeline.svelte
+++ b/src/components/evaluator/Timeline.svelte
@@ -9,7 +9,7 @@
     import ExceptionValue from '@values/ExceptionValue';
     import { getEvaluation } from '../project/Contexts';
     import Controls from './Controls.svelte';
-    import { animationDuration, locale } from '../../db/Database';
+    import { animationDuration, locales } from '../../db/Database';
     import StructureValue from '@values/StructureValue';
 
     export let evaluator: Evaluator;
@@ -174,7 +174,7 @@
 
 <section
     class="evaluation"
-    aria-label={$locale.ui.timeline.label}
+    aria-label={$locales.get((l) => l.ui.timeline.label)}
     class:stepping={$evaluation?.playing === false}
 >
     <Controls {evaluator} />
@@ -184,12 +184,12 @@
         class="timeline"
         tabindex={0}
         data-uiid="timeline"
-        aria-label={$locale.ui.timeline.slider}
+        aria-label={$locales.get((l) => l.ui.timeline.slider)}
         aria-valuemin={0}
         aria-valuemax={$evaluation.evaluator.getStepCount()}
         aria-valuenow={$evaluation.stepIndex}
         aria-valuetext={$evaluation.step
-            ? $evaluation.step.getExplanations($locale, evaluator).toText()
+            ? $evaluation.step.getExplanations($locales, evaluator).toText()
             : $evaluation.stepIndex + ''}
         aria-orientation="horizontal"
         class:stepping={$evaluation.playing === false}
diff --git a/src/components/lore/Speech.svelte b/src/components/lore/Speech.svelte
index aa0f23e9d..c506b0cdc 100644
--- a/src/components/lore/Speech.svelte
+++ b/src/components/lore/Speech.svelte
@@ -7,7 +7,7 @@
     import type Glyph from '../../lore/Glyph';
     import ConceptLinkUI from '../concepts/ConceptLinkUI.svelte';
     import Eyes from './Eyes.svelte';
-    import { locales, locale } from '../../db/Database';
+    import { locales } from '@db/Database';
     import Emotion from '../../lore/Emotion';
 
     export let glyph: Glyph | Concept;
@@ -28,7 +28,7 @@
 
     $: renderedEmotion =
         emotion ??
-        (glyph instanceof Concept ? glyph?.getEmotion($locale) : undefined);
+        (glyph instanceof Concept ? glyph?.getEmotion($locales) : undefined);
 
     $: glyphs =
         glyph instanceof Concept
diff --git a/src/components/output/GroupView.svelte b/src/components/output/GroupView.svelte
index dd7778c75..79594c81d 100644
--- a/src/components/output/GroupView.svelte
+++ b/src/components/output/GroupView.svelte
@@ -16,7 +16,7 @@
     import Evaluate from '@nodes/Evaluate';
     import { getSelectedOutput } from '../project/Contexts';
     import type Stage from '../../output/Stage';
-    import { locale, locales } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import type { Form } from '../../output/Form';
     import Shape from '../../output/Shape';
     import ShapeView from './ShapeView.svelte';
@@ -61,8 +61,8 @@
     role={!group.selectable ? 'presentation' : 'group'}
     aria-label={still ? group.getDescription($locales) : null}
     aria-roledescription={group instanceof Group
-        ? $locale.term.group
-        : $locale.term.stage}
+        ? $locales.get((l) => l.term.group)
+        : $locales.get((l) => l.term.stage)}
     aria-hidden={empty ? 'true' : null}
     class="output group {group.constructor.name}"
     class:selected={selected && !root}
diff --git a/src/components/output/OutputDescriptions.ts b/src/components/output/OutputDescriptions.ts
index 2d4a36e04..75140a27c 100644
--- a/src/components/output/OutputDescriptions.ts
+++ b/src/components/output/OutputDescriptions.ts
@@ -1,4 +1,4 @@
-import type Locale from '../../locale/Locale';
+import type Locales from '../../locale/Locales';
 import Evaluate from '../../nodes/Evaluate';
 import Reference from '../../nodes/Reference';
 import Phrase from '../../output/Phrase';
@@ -7,11 +7,11 @@ import Sequence from '../../output/Sequence';
 
 /** A description of phrases that have entered the scene, computed after still. */
 export function describeEnteredOutput(
-    locales: Locale[],
+    locales: Locales,
     entered: OutputsByName
 ) {
     return entered.size > 0
-        ? locales[0].term.entered +
+        ? locales.get((l) => l.term.entered) +
               ' ' +
               Array.from(entered.values())
                   .filter(
@@ -24,7 +24,7 @@ export function describeEnteredOutput(
 
 /** A description of non-entering phrases that changed text, computed after still. */
 export function describedChangedOutput(
-    locales: Locale[],
+    locales: Locales,
     entered: OutputsByName,
     present: OutputsByName,
     previouslyPresent: OutputsByName | undefined
@@ -71,12 +71,15 @@ export function describedChangedOutput(
     return changed;
 }
 
-export function describeMovedOutput(locales: Locale[], moved: Moved) {
+export function describeMovedOutput(locales: Locales, moved: Moved) {
     const descriptions: string[] = [];
     for (const { output } of moved.values()) {
         descriptions.push(output.getShortDescription(locales));
     }
 
     if (descriptions.length === 0) return '';
-    else return locales[0].term.moved + ', ' + descriptions.join(', ');
+    else
+        return (
+            locales.get((l) => l.term.moved) + ', ' + descriptions.join(', ')
+        );
 }
diff --git a/src/components/output/OutputView.svelte b/src/components/output/OutputView.svelte
index 679e3c870..69c265154 100644
--- a/src/components/output/OutputView.svelte
+++ b/src/components/output/OutputView.svelte
@@ -23,10 +23,8 @@
     import {
         animationFactor,
         DB,
-        locale,
         locales,
         Projects,
-        writingDirection,
         writingLayout,
     } from '../../db/Database';
     import type Color from '../../output/Color';
@@ -124,10 +122,10 @@
     $: if ($announce && value && (exception || stageValue === undefined))
         $announce(
             'value',
-            $locale.language,
+            $locales.getLanguages()[0],
             exception
-                ? exception.getExplanation($locale).toText()
-                : value.getDescription(concretize, $locale).toText()
+                ? exception.getExplanation($locales).toText()
+                : value.getDescription(concretize, $locales).toText()
         );
 
     /** When creator's preferred animation factor changes, update evaluator */
@@ -288,7 +286,8 @@
                 .map((stream) => stream.react({ key: event.key, down: true }));
 
             // Announce the key pressed
-            if ($announce) $announce('keyinput', $locale.language, event.key);
+            if ($announce)
+                $announce('keyinput', $locales.getLanguages()[0], event.key);
 
             // Map keys onto axes of change for any Placement streams.
             if (
@@ -448,7 +447,7 @@
                     $selectedOutput && $selectedOutput.length > 0
                     ? getOrCreatePlace(
                           project,
-                          $locale,
+                          $locales,
                           $selectedOutput[0],
                           evaluator.project.getNodeContext($selectedOutput[0])
                       )
@@ -852,7 +851,7 @@
     class="output"
     data-uuid="stage"
     role="application"
-    aria-label={$locale.ui.output.label}
+    aria-label={$locales.get((l) => l.ui.output.label)}
     class:mini
     class:editing={$evaluation?.playing === false && !painting}
     class:selected={stageValue &&
@@ -860,7 +859,7 @@
         stageValue.value.creator instanceof Evaluate &&
         $selectedOutput &&
         $selectedOutput.includes(stageValue.value.creator)}
-    style:direction={$writingDirection}
+    style:direction={$locales.getDirection()}
     style:writing-mode={$writingLayout}
 >
     <div
@@ -885,11 +884,13 @@
                     type="text"
                     class="keyboard-input"
                     placeholder={chats
-                        ? $locale.ui.output.field.key.placeholder
+                        ? $locales.get((l) => l.ui.output.field.key.placeholder)
                         : null}
                     data-defaultfocus
                     aria-autocomplete="none"
-                    aria-label={$locale.ui.output.field.key.description}
+                    aria-label={$locales.get(
+                        (l) => l.ui.output.field.key.description
+                    )}
                     autocomplete={chats ? 'on' : 'off'}
                     autocorrect={chats ? 'on' : 'off'}
                     on:keydown={(event) =>
@@ -904,7 +905,7 @@
                 />
                 {#if chats}
                     <ButtonUI
-                        tip={$locale.ui.output.button.submit}
+                        tip={$locales.get((l) => l.ui.output.button.submit)}
                         action={submitChat}>↑</ButtonUI
                     >
                 {/if}
@@ -920,12 +921,10 @@
                         invert
                     >
                         <svelte:fragment slot="content">
-                            {#each $locales as locale}
-                                <MarkupHTMLView
-                                    markup={exception.getExplanation(locale)}
-                                />
-                            {/each}</svelte:fragment
-                        ></Speech
+                            <MarkupHTMLView
+                                markup={exception.getExplanation($locales)}
+                            />
+                        </svelte:fragment></Speech
                     >
                 {/if}
             </div>
@@ -939,7 +938,7 @@
                     <ValueView {value} interactive={false} />
                 {:else}
                     {@const description = value
-                        .getDescription(concretize, $locale)
+                        .getDescription(concretize, $locales)
                         .toText()}
                     <h2>{description}</h2>
                     <ValueView {value} inline={false} />
diff --git a/src/components/output/Painting.svelte b/src/components/output/Painting.svelte
index 035e4bac0..4d3d5eeb8 100644
--- a/src/components/output/Painting.svelte
+++ b/src/components/output/Painting.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import Switch from '@components/widgets/Switch.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let painting: boolean;
 </script>
@@ -8,8 +8,8 @@
 <Switch
     on={painting}
     toggle={(on) => (painting = on)}
-    offTip={$locale.ui.output.toggle.paint.off}
-    onTip={$locale.ui.output.toggle.paint.on}
+    offTip={$locales.get((l) => l.ui.output.toggle.paint.off)}
+    onTip={$locales.get((l) => l.ui.output.toggle.paint.on)}
     offLabel="✥"
     onLabel="🖌️"
 />
diff --git a/src/components/output/PhraseView.svelte b/src/components/output/PhraseView.svelte
index df8680af2..9dcdc889e 100644
--- a/src/components/output/PhraseView.svelte
+++ b/src/components/output/PhraseView.svelte
@@ -27,7 +27,7 @@
         getSelectedOutput,
         getSelectedPhrase,
     } from '../project/Contexts';
-    import { DB, Projects, locale, locales } from '../../db/Database';
+    import { DB, Projects, locales } from '../../db/Database';
     import TextLang from '../../output/TextLang';
     import MarkupHtmlView from '../concepts/MarkupHTMLView.svelte';
     import Markup from '../../nodes/Markup';
@@ -194,7 +194,9 @@
         aria-hidden={empty ? 'true' : null}
         aria-disabled={!selectable}
         aria-label={still ? phrase.getDescription($locales) : null}
-        aria-roledescription={!selectable ? $locale.term.phrase : null}
+        aria-roledescription={!selectable
+            ? $locales.get((l) => l.term.phrase)
+            : null}
         class="output phrase"
         class:selected
         tabIndex={interactive && ((!empty && selectable) || editing) ? 0 : null}
diff --git a/src/components/output/ShapeView.svelte b/src/components/output/ShapeView.svelte
index c7dceb72a..4b84b5100 100644
--- a/src/components/output/ShapeView.svelte
+++ b/src/components/output/ShapeView.svelte
@@ -9,7 +9,7 @@
         PX_PER_METER,
     } from '@output/outputToCSS';
     import type RenderContext from '@output/RenderContext';
-    import { locale, locales } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import type Shape from '../../output/Shape';
     import { Rectangle } from '../../output/Form';
 
@@ -36,7 +36,9 @@
         role={selectable ? 'button' : 'presentation'}
         aria-disabled={!selectable}
         aria-label={still ? shape.getDescription($locales) : null}
-        aria-roledescription={!selectable ? $locale.term.phrase : null}
+        aria-roledescription={!selectable
+            ? $locales.get((l) => l.term.phrase)
+            : null}
         class="output shape {shape.form instanceof Rectangle
             ? 'rectangle'
             : ''}"
diff --git a/src/components/output/StageView.svelte b/src/components/output/StageView.svelte
index 7242abbd6..95a3e1f63 100644
--- a/src/components/output/StageView.svelte
+++ b/src/components/output/StageView.svelte
@@ -35,7 +35,7 @@
     } from '../project/Contexts';
     import type Evaluator from '@runtime/Evaluator';
     import type Output from '../../output/Output';
-    import { animationFactor, locale, locales } from '../../db/Database';
+    import { animationFactor, locales } from '../../db/Database';
     import {
         describeEnteredOutput,
         describeMovedOutput,
@@ -100,7 +100,7 @@
 
     // Announce changes on stage.
     $: if ($announcer) {
-        const language = $locales[0].language;
+        const language = $locales.getLocale().language;
         if (entered.size > 0)
             $announcer(
                 'entered',
@@ -218,7 +218,7 @@
     }
 
     $: context = new RenderContext(
-        stage.face ?? $locale.ui.font.app,
+        stage.face ?? $locales.getLocale().ui.font.app,
         stage.size ?? DefaultSize,
         $locales,
         $loadedFonts,
diff --git a/src/components/palette/BindText.svelte b/src/components/palette/BindText.svelte
index a6b231443..b6f61dbac 100644
--- a/src/components/palette/BindText.svelte
+++ b/src/components/palette/BindText.svelte
@@ -4,7 +4,7 @@
     import TextField from '../widgets/TextField.svelte';
     import type OutputProperty from '@edit/OutputProperty';
     import { getProject } from '../project/Contexts';
-    import { locale, locales, languages, Projects } from '@db/Database';
+    import { locales, Projects } from '@db/Database';
     import { tick } from 'svelte';
     import Language from '@nodes/Language';
     import { FORMATTED_SYMBOL } from '@parser/Symbols';
@@ -29,7 +29,10 @@
                 property.getName(),
                 newValue.startsWith(FORMATTED_SYMBOL)
                     ? parseFormattedLiteral(toTokens(newValue))
-                    : TextLiteral.make(newValue, Language.make($languages[0]))
+                    : TextLiteral.make(
+                          newValue,
+                          Language.make($locales.getLanguages()[0])
+                      )
             )
         );
 
@@ -40,10 +43,10 @@
 
 <TextField
     text={values.getText()}
-    description={$locale.ui.palette.field.text}
+    description={$locales.get((l) => l.ui.palette.field.text)}
     placeholder={values.isEmpty()
         ? ''
-        : values.values[0].bind.names.getPreferredNameString($locales)}
+        : $locales.getName(values.values[0].bind.names)}
     {validator}
     changed={handleChange}
     bind:view
diff --git a/src/components/palette/ContentEditor.svelte b/src/components/palette/ContentEditor.svelte
index c876b598d..12b50ac2e 100644
--- a/src/components/palette/ContentEditor.svelte
+++ b/src/components/palette/ContentEditor.svelte
@@ -10,7 +10,7 @@
     } from '../project/Contexts';
     import { addContent, moveContent, removeContent } from './editOutput';
     import type ListLiteral from '../../nodes/ListLiteral';
-    import { DB, locale } from '../../db/Database';
+    import { DB, locales } from '@db/Database';
     import { EDIT_SYMBOL } from '../../parser/Symbols';
 
     export let project: Project;
@@ -53,7 +53,7 @@
         {#each list.values as content, index}
             <div class="content">
                 <Button
-                    tip={$locale.ui.palette.button.remove}
+                    tip={$locales.get((l) => l.ui.palette.button.remove)}
                     action={() =>
                         list
                             ? removeContent(DB, project, list, index)
@@ -61,7 +61,7 @@
                     active={editable && list.values.length > 0}>⨉</Button
                 >
                 <Button
-                    tip={$locale.ui.palette.button.up}
+                    tip={$locales.get((l) => l.ui.palette.button.up)}
                     action={() =>
                         list
                             ? moveContent(DB, project, list, index, -1)
@@ -69,7 +69,7 @@
                     active={editable && index > 0}>↑</Button
                 >
                 <Button
-                    tip={$locale.ui.palette.button.down}
+                    tip={$locales.get((l) => l.ui.palette.button.down)}
                     action={() =>
                         list
                             ? moveContent(DB, project, list, index, 1)
@@ -78,7 +78,7 @@
                     >↓</Button
                 >
                 <Button
-                    tip={$locale.ui.palette.button.edit}
+                    tip={$locales.get((l) => l.ui.palette.button.edit)}
                     active={editable}
                     action={() => editContent(index)}>{EDIT_SYMBOL}</Button
                 >
@@ -87,7 +87,7 @@
         {/each}
         <div class="add">
             <Button
-                tip={$locale.ui.palette.button.addPhrase}
+                tip={$locales.get((l) => l.ui.palette.button.addPhrase)}
                 active={editable}
                 action={() =>
                     list
@@ -102,7 +102,7 @@
                 >+{project.shares.output.Phrase.getNames()[0]}</Button
             >
             <Button
-                tip={$locale.ui.palette.button.addGroup}
+                tip={$locales.get((l) => l.ui.palette.button.addGroup)}
                 active={editable}
                 action={() =>
                     list
@@ -117,7 +117,7 @@
                 >+{project.shares.output.Group.getNames()[0]}</Button
             >
             <Button
-                tip={$locale.ui.palette.button.addShape}
+                tip={$locales.get((l) => l.ui.palette.button.addShape)}
                 active={editable}
                 action={() =>
                     list
@@ -133,7 +133,7 @@
             ></div
         >
     {:else}
-        <Note>{$locale.ui.palette.labels.computed}</Note>
+        <Note>{$locales.get((l) => l.ui.palette.labels.computed)}</Note>
     {/if}
 </div>
 
diff --git a/src/components/palette/EditOffer.svelte b/src/components/palette/EditOffer.svelte
index 3a091a451..a19631f60 100644
--- a/src/components/palette/EditOffer.svelte
+++ b/src/components/palette/EditOffer.svelte
@@ -1,12 +1,13 @@
 <script lang="ts">
-    import type { Locale, Template } from '../../locale/Locale';
+    import type { Template } from '../../locale/Locale';
+    import type Locales from '../../locale/Locales';
     import concretize from '../../locale/concretize';
     import MarkupHtmlView from '../concepts/MarkupHTMLView.svelte';
     import Speech from '../lore/Speech.svelte';
     import Button from '../widgets/Button.svelte';
 
     export let symbols: string;
-    export let locale: Locale;
+    export let locales: Locales;
     export let message: Template;
     export let tip: string;
     export let action: () => void;
@@ -16,7 +17,7 @@
 <div class="offer">
     <Speech glyph={{ symbols }}>
         <svelte:fragment slot="content">
-            <MarkupHtmlView markup={concretize(locale, message)} />
+            <MarkupHtmlView markup={concretize(locales, message)} />
         </svelte:fragment>
     </Speech>
     <Button large {tip} {action}>{command}</Button>
diff --git a/src/components/palette/Palette.svelte b/src/components/palette/Palette.svelte
index 6bb44d8af..8b4bf29a8 100644
--- a/src/components/palette/Palette.svelte
+++ b/src/components/palette/Palette.svelte
@@ -10,7 +10,7 @@
         getEvaluation,
         getSelectedOutput,
     } from '../project/Contexts';
-    import { DB, locale, locales } from '../../db/Database';
+    import { DB, locales } from '../../db/Database';
     import concretize from '../../locale/concretize';
     import {
         addGroup,
@@ -80,7 +80,7 @@
     }
 </script>
 
-<section class="palette" aria-label={$locale.ui.palette.label}>
+<section class="palette" aria-label={$locales.get((l) => l.ui.palette.label)}>
     {#if propertyValues.size > 0}
         <Speech
             glyph={(outputs.length > 1 || definition === undefined
@@ -97,8 +97,8 @@
             <svelte:fragment slot="content">
                 <MarkupHtmlView
                     markup={concretize(
-                        $locale,
-                        $locale.ui.palette.prompt.editing
+                        $locales,
+                        $locales.get((l) => l.ui.palette.prompt.editing)
                     )}
                 />
             </svelte:fragment>
@@ -112,9 +112,9 @@
         {#if $evaluation.playing && hasOutput(project)}
             <EditOffer
                 symbols={PALETTE_SYMBOL}
-                locale={$locale}
-                message={$locale.ui.palette.prompt.pauseToEdit}
-                tip={$locale.ui.timeline.button.pause}
+                locales={$locales}
+                message={$locales.get((l) => l.ui.palette.prompt.pauseToEdit)}
+                tip={$locales.get((l) => l.ui.timeline.button.pause)}
                 action={() => $evaluation.evaluator.pause()}
                 command="⏸️"
             />
@@ -123,9 +123,11 @@
             {#if phrase === undefined}
                 <EditOffer
                     symbols={PHRASE_SYMBOL}
-                    locale={$locale}
-                    message={$locale.ui.palette.prompt.offerPhrase}
-                    tip={$locale.ui.palette.button.createPhrase}
+                    locales={$locales}
+                    message={$locales.get(
+                        (l) => l.ui.palette.prompt.offerPhrase
+                    )}
+                    tip={$locales.get((l) => l.ui.palette.button.createPhrase)}
                     action={() => addSoloPhrase(DB, project)}
                     command={`+${PHRASE_SYMBOL}`}
                 />
@@ -133,9 +135,11 @@
             {#if phrase !== undefined && stage === undefined}
                 <EditOffer
                     symbols={GROUP_SYMBOL}
-                    locale={$locale}
-                    message={$locale.ui.palette.prompt.offerGroup}
-                    tip={$locale.ui.palette.button.createGroup}
+                    locales={$locales}
+                    message={$locales.get(
+                        (l) => l.ui.palette.prompt.offerGroup
+                    )}
+                    tip={$locales.get((l) => l.ui.palette.button.createGroup)}
                     action={() => addGroup(DB, project)}
                     command={`+${GROUP_SYMBOL}`}
                 />
@@ -143,9 +147,11 @@
             {#if stage === undefined}
                 <EditOffer
                     symbols={STAGE_SYMBOL}
-                    locale={$locale}
-                    message={$locale.ui.palette.prompt.offerStage}
-                    tip={$locale.ui.palette.button.createStage}
+                    locales={$locales}
+                    message={$locales.get(
+                        (l) => l.ui.palette.prompt.offerStage
+                    )}
+                    tip={$locales.get((l) => l.ui.palette.button.createStage)}
                     action={() => addStage(DB, project, group ?? phrase)}
                     command={`+${STAGE_SYMBOL}`}
                 />
diff --git a/src/components/palette/PaletteProperty.svelte b/src/components/palette/PaletteProperty.svelte
index 00b291581..e19bb3682 100644
--- a/src/components/palette/PaletteProperty.svelte
+++ b/src/components/palette/PaletteProperty.svelte
@@ -21,7 +21,7 @@
     import PlaceEditor from './PlaceEditor.svelte';
     import ConceptLinkUI from '../concepts/ConceptLinkUI.svelte';
     import { getConceptIndex } from '../project/Contexts';
-    import { DB, locale, locales } from '../../db/Database';
+    import { DB, locales } from '../../db/Database';
     import { tick } from 'svelte';
     import { DOCUMENTATION_SYMBOL, EDIT_SYMBOL } from '../../parser/Symbols';
     import MotionEditor from './MotionEditor.svelte';
@@ -57,46 +57,36 @@
                 /></small
             >{/if}
         <label for={property.getName()}
-            >{bindConcept?.getName($locale, false) ?? '—'}</label
+            >{bindConcept?.getName($locales, false) ?? '—'}</label
         ></h3
     >
     {#if editable}
         <Button
             tip={valuesAreSet
-                ? $locale.ui.palette.button.revert
-                : $locale.ui.palette.button.set}
+                ? $locales.get((l) => l.ui.palette.button.revert)
+                : $locales.get((l) => l.ui.palette.button.set)}
             bind:view={toggleView}
             action={() => toggleValues(!valuesAreSet)}
             >{valuesAreSet ? '⨉' : EDIT_SYMBOL}</Button
         >{/if}
     <div class="control">
         {#if values.areMixed()}
-            <Note
-                >{$locales
-                    .map((locale) => locale.ui.palette.labels.mixed)
-                    .join('/')}</Note
-            >
+            <Note>{$locales.get((l) => l.ui.palette.labels.mixed)}</Note>
         {:else if !values.areSet()}
             {@const expression = values.getExpression()}
             <!-- If the values arent set, show as inherited if inherited, and otherwise show the default -->
             <Note
-                >{#if property.inherited}{$locales
-                        .map((locale) => locale.ui.palette.labels.inherited)
-                        .join(
-                            '/'
-                        )}{:else if values.areDefault() && expression !== undefined}<NodeView
+                >{#if property.inherited}{$locales.get(
+                        (l) => l.ui.palette.labels.inherited
+                    )}{:else if values.areDefault() && expression !== undefined}<NodeView
                         node={expression}
                     />
-                    {$locales
-                        .map((locale) => locale.ui.palette.labels.default)
-                        .join('/')}{:else}&mdash;{/if}</Note
+                    {$locales.get(
+                        (l) => l.ui.palette.labels.default
+                    )}{:else}&mdash;{/if}</Note
             >
         {:else if !values.areEditable(project)}
-            <Note
-                >{$locales.map(
-                    (locale) => locale.ui.palette.labels.computed
-                )}</Note
-            >
+            <Note>{$locales.get((l) => l.ui.palette.labels.computed)}</Note>
         {:else if property.type instanceof OutputPropertyRange}
             <BindSlider {property} {values} range={property.type} {editable} />
         {:else if property.type instanceof OutputPropertyOptions}
diff --git a/src/components/palette/PlaceEditor.svelte b/src/components/palette/PlaceEditor.svelte
index 3f17ad918..2bc9e859d 100644
--- a/src/components/palette/PlaceEditor.svelte
+++ b/src/components/palette/PlaceEditor.svelte
@@ -8,7 +8,7 @@
     import Note from '../widgets/Note.svelte';
     import { getNumber } from './editOutput';
     import Expression from '../../nodes/Expression';
-    import { Projects, locale, locales } from '../../db/Database';
+    import { Projects, locales } from '../../db/Database';
     import { tick } from 'svelte';
     import Button from '../widgets/Button.svelte';
     import type Bind from '../../nodes/Bind';
@@ -84,14 +84,16 @@
                     validator={valid}
                     {editable}
                     placeholder={dimension.names.getNames()[0]}
-                    description={$locale.ui.palette.field.coordinate}
+                    description={$locales.get(
+                        (l) => l.ui.palette.field.coordinate
+                    )}
                     changed={(value) => handleChange(dimension, value)}
                     bind:view={views[index]}
                 />
                 <Note>{getUnit(dimension)?.toWordplay() ?? ''}</Note>
             {:else}
                 <Note
-                    >{$locales.map(
+                    >{$locales.get(
                         (locale) => locale.ui.palette.labels.computed
                     )}</Note
                 >
@@ -101,7 +103,7 @@
 </div>
 {#if convertable}
     <Button
-        tip={$locale.ui.palette.button.addMotion}
+        tip={$locales.get((l) => l.ui.palette.button.addMotion)}
         active={editable}
         action={() =>
             Projects.revise(project, [
@@ -136,7 +138,7 @@
             ])}>→{project.shares.input.Motion.getNames()[0]}</Button
     >
     <Button
-        tip={$locale.ui.palette.button.addPlacement}
+        tip={$locales.get((l) => l.ui.palette.button.addPlacement)}
         active={editable}
         action={() =>
             Projects.revise(project, [
diff --git a/src/components/palette/PoseEditor.svelte b/src/components/palette/PoseEditor.svelte
index eaaebaf71..70fb42ec3 100644
--- a/src/components/palette/PoseEditor.svelte
+++ b/src/components/palette/PoseEditor.svelte
@@ -10,7 +10,7 @@
     import MapLiteral from '@nodes/MapLiteral';
     import KeyValue from '@nodes/KeyValue';
     import NumberLiteral from '@nodes/NumberLiteral';
-    import { Projects, locale, locales } from '../../db/Database';
+    import { Projects, locales } from '@db/Database';
     import getPoseProperties from '@edit/PoseProperties';
 
     export let project: Project;
@@ -18,7 +18,7 @@
     export let sequence: boolean;
     export let editable: boolean;
 
-    $: PoseProperties = getPoseProperties(project, $locale, false);
+    $: PoseProperties = getPoseProperties(project, $locales, false);
 
     // Create a mapping from pose properties to values
     let propertyValues: Map<OutputProperty, OutputPropertyValueSet>;
@@ -41,9 +41,7 @@
                 output.node,
                 Evaluate.make(
                     Reference.make(
-                        project.shares.output.Sequence.names.getPreferredNameString(
-                            $locales
-                        ),
+                        $locales.getName(project.shares.output.Sequence.names),
                         project.shares.output.Sequence
                     ),
                     [
@@ -65,7 +63,9 @@
         <PaletteProperty {project} {property} {values} {editable} />
     {/each}
     {#if !sequence && editable}
-        <Button tip={$locale.ui.palette.button.sequence} action={convert}
+        <Button
+            tip={$locales.get((l) => l.ui.palette.button.sequence)}
+            action={convert}
             >{project.shares.output.Sequence.getNames()[0]}</Button
         >
     {/if}
diff --git a/src/components/palette/SequenceEditor.svelte b/src/components/palette/SequenceEditor.svelte
index 3a3d2cec5..3c3cfd795 100644
--- a/src/components/palette/SequenceEditor.svelte
+++ b/src/components/palette/SequenceEditor.svelte
@@ -4,14 +4,14 @@
     import PaletteProperty from './PaletteProperty.svelte';
     import type Project from '@models/Project';
     import type OutputExpression from '@edit/OutputExpression';
-    import { locale } from '../../db/Database';
+    import { locales } from '@db/Database';
     import getSequenceProperties from '../../edit/SequenceProperties';
 
     export let project: Project;
     export let outputs: OutputExpression[];
     export let editable: boolean;
 
-    $: SequenceProperties = getSequenceProperties(project, $locale);
+    $: SequenceProperties = getSequenceProperties(project, $locales);
 
     // Create a mapping from pose properties to values
     let propertyValues: Map<OutputProperty, OutputPropertyValueSet>;
diff --git a/src/components/palette/SequencePosesEditor.svelte b/src/components/palette/SequencePosesEditor.svelte
index f3e4bcd6a..3fdea27e4 100644
--- a/src/components/palette/SequencePosesEditor.svelte
+++ b/src/components/palette/SequencePosesEditor.svelte
@@ -12,7 +12,7 @@
     import type Expression from '@nodes/Expression';
     import Button from '../widgets/Button.svelte';
     import Note from '../widgets/Note.svelte';
-    import { Projects, locale, locales } from '../../db/Database';
+    import { Projects, locales } from '@db/Database';
 
     export let project: Project;
     export let map: MapLiteral | undefined;
@@ -93,8 +93,9 @@
                     <div class="percent"
                         ><TextField
                             text={pair.key.toWordplay()}
-                            description={$locale.ui.palette.sequence.field
-                                .percent}
+                            description={$locales.get(
+                                (l) => l.ui.palette.sequence.field
+                            ).percent}
                             placeholder="%"
                             validator={(value) => {
                                 const number = parseInt(value.replace('%', ''));
@@ -125,24 +126,32 @@
                             {editable}
                         />
                         <Button
-                            tip={$locale.ui.palette.sequence.button.add}
+                            tip={$locales.get(
+                                (l) => l.ui.palette.sequence.button.add
+                            )}
                             active={editable}
                             action={() => addPose(index)}>+</Button
                         >
                         <Button
-                            tip={$locale.ui.palette.sequence.button.remove}
+                            tip={$locales.get(
+                                (l) => l.ui.palette.sequence.button.remove
+                            )}
                             action={() => removePose(index)}
                             active={editable &&
                                 map !== undefined &&
                                 map.values.length > 1}>⨉</Button
                         >
                         <Button
-                            tip={$locale.ui.palette.sequence.button.up}
+                            tip={$locales.get(
+                                (l) => l.ui.palette.sequence.button.up
+                            )}
                             action={() => movePose(index, -1)}
                             active={editable && index > 0}>↑</Button
                         >
                         <Button
-                            tip={$locale.ui.palette.sequence.button.down}
+                            tip={$locales.get(
+                                (l) => l.ui.palette.sequence.button.down
+                            )}
                             action={() => movePose(index, 1)}
                             active={editable && index < map.values.length - 1}
                             >↓</Button
@@ -166,7 +175,7 @@
             {/if}
         {/each}
     {:else}
-        <Note>{$locale.ui.palette.labels.notSequence}</Note>
+        <Note>{$locales.get((l) => l.ui.palette.labels.notSequence)}</Note>
     {/if}
 </div>
 
diff --git a/src/components/palette/VelocityEditor.svelte b/src/components/palette/VelocityEditor.svelte
index c79a34236..92561cfd2 100644
--- a/src/components/palette/VelocityEditor.svelte
+++ b/src/components/palette/VelocityEditor.svelte
@@ -8,7 +8,7 @@
     import Note from '../widgets/Note.svelte';
     import { getNumber } from './editOutput';
     import Expression from '../../nodes/Expression';
-    import { Projects, locale, locales } from '../../db/Database';
+    import { Projects, locales } from '../../db/Database';
     import { tick } from 'svelte';
     import type Bind from '../../nodes/Bind';
 
@@ -69,7 +69,9 @@
                     validator={valid}
                     {editable}
                     placeholder={dimension.names.getNames()[0]}
-                    description={$locale.ui.palette.field.coordinate}
+                    description={$locales.get(
+                        (l) => l.ui.palette.field.coordinate
+                    )}
                     changed={(value) => handleChange(dimension, index, value)}
                     bind:view={views[index]}
                 />
@@ -78,7 +80,7 @@
                 >
             {:else}
                 <Note
-                    >{$locales.map(
+                    >{$locales.get(
                         (locale) => locale.ui.palette.labels.computed
                     )}</Note
                 >
diff --git a/src/components/palette/editOutput.ts b/src/components/palette/editOutput.ts
index eb6c639dd..1de3b7e6d 100644
--- a/src/components/palette/editOutput.ts
+++ b/src/components/palette/editOutput.ts
@@ -10,7 +10,6 @@ import UnaryEvaluate from '../../nodes/UnaryEvaluate';
 import Decimal from 'decimal.js';
 import TextLiteral from '../../nodes/TextLiteral';
 import ListLiteral from '../../nodes/ListLiteral';
-import type Locale from '../../locale/Locale';
 import FormattedLiteral from '../../nodes/FormattedLiteral';
 import Convert from '../../nodes/Convert';
 import TextType from '../../nodes/TextType';
@@ -22,6 +21,7 @@ import {
 import { toExpression } from '../../parser/parseExpression';
 import { getPlaceExpression } from '../../output/getOrCreatePlace';
 import type Spread from '../../nodes/Spread';
+import type Locales from '../../locale/Locales';
 
 export function getNumber(given: Expression): number | undefined {
     const measurement =
@@ -44,7 +44,7 @@ export default function moveOutput(
     db: Database,
     project: Project,
     evaluates: Evaluate[],
-    locales: Locale[],
+    locales: Locales,
     horizontal: number,
     vertical: number,
     relative: boolean
@@ -93,9 +93,7 @@ export default function moveOutput(
                           bind,
                           Evaluate.make(
                               Reference.make(
-                                  PlaceType.names.getPreferredNameString(
-                                      locales
-                                  ),
+                                  locales.getName(PlaceType.names),
                                   PlaceType
                               ),
                               [
@@ -135,12 +133,11 @@ export default function moveOutput(
     );
 }
 
-export function createPlaceholderPhrase(project: Project, locales: Locale[]) {
+export function createPlaceholderPhrase(project: Project, locales: Locales) {
     const PhraseType = project.shares.output.Phrase;
-    return Evaluate.make(
-        Reference.make(PhraseType.names.getPreferredNameString(locales)),
-        [TextLiteral.make(locales[0].ui.phrases.welcome)]
-    );
+    return Evaluate.make(Reference.make(locales.getName(PhraseType.names)), [
+        TextLiteral.make(locales.get((l) => l.ui.phrases.welcome)),
+    ]);
 }
 
 export function addContent(
@@ -152,7 +149,7 @@ export function addContent(
 ) {
     const GroupType = project.shares.output.Group;
     const RowType = project.shares.output.Row;
-    const locales = database.Locales.getLocales();
+    const locales = database.Locales.getLocaleSet();
     reviseContent(database, project, list, [
         ...list.values.slice(0, index + 1),
         kind === 'phrase'
@@ -244,7 +241,10 @@ export function addStageContent(
     }
 
     if (content === undefined)
-        content = createPlaceholderPhrase(project, database.getLocales());
+        content = createPlaceholderPhrase(
+            project,
+            database.Locales.getLocaleSet()
+        );
 
     if (stage) {
         const context = project.getNodeContext(stage);
@@ -362,7 +362,8 @@ export function addStage(
     // Build a new stage, wrapping the phrase.
     stage = Evaluate.make(Reference.make(STAGE_SYMBOL), [
         ListLiteral.make([
-            existing ?? createPlaceholderPhrase(project, db.getLocales()),
+            existing ??
+                createPlaceholderPhrase(project, db.Locales.getLocaleSet()),
         ]),
     ]);
 
diff --git a/src/components/project/Collaborators.svelte b/src/components/project/Collaborators.svelte
index 0fa1e30b4..65c08ceb6 100644
--- a/src/components/project/Collaborators.svelte
+++ b/src/components/project/Collaborators.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import { get } from 'svelte/store';
-    import { Galleries, Projects, locale } from '../../db/Database';
+    import { Galleries, Projects, locales } from '../../db/Database';
     import type Project from '../../models/Project';
     import Subheader from '../app/Subheader.svelte';
     import MarkupHtmlView from '../concepts/MarkupHTMLView.svelte';
@@ -17,12 +17,16 @@
     const creatorGalleries = Galleries.creatorGalleries;
 </script>
 
-<Dialog bind:show description={$locale.ui.dialog.share}>
+<Dialog bind:show description={$locales.get((l) => l.ui.dialog.share)}>
     <Subheader
-        >{$locale.ui.dialog.share.subheader.collaborators.header}</Subheader
+        >{$locales.get(
+            (l) => l.ui.dialog.share.subheader.collaborators.header
+        )}</Subheader
     >
     <MarkupHtmlView
-        markup={$locale.ui.dialog.share.subheader.collaborators.explanation}
+        markup={$locales.get(
+            (l) => l.ui.dialog.share.subheader.collaborators.explanation
+        )}
     />
 
     <CreatorList
@@ -36,9 +40,15 @@
         removable={() => true}
     />
 
-    <Subheader>{$locale.ui.dialog.share.subheader.gallery.header}</Subheader>
+    <Subheader
+        >{$locales.get(
+            (l) => l.ui.dialog.share.subheader.gallery.header
+        )}</Subheader
+    >
     <MarkupHtmlView
-        markup={$locale.ui.dialog.share.subheader.gallery.explanation}
+        markup={$locales.get(
+            (l) => l.ui.dialog.share.subheader.gallery.explanation
+        )}
     />
 
     <Options
@@ -49,7 +59,7 @@
             ...Array.from($creatorGalleries.values()).map((gallery) => {
                 return {
                     value: get(gallery).getID(),
-                    label: get(gallery).getName($locale),
+                    label: get(gallery).getName($locales.getLocale()),
                 };
             }),
         ]}
diff --git a/src/components/project/CommandDescription.svelte b/src/components/project/CommandDescription.svelte
index 5ee77eee6..e54b568fd 100644
--- a/src/components/project/CommandDescription.svelte
+++ b/src/components/project/CommandDescription.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { locale } from '../../db/Database';
+    import { locales } from '@db/Database';
     import { toShortcut, type Command } from '../editor/util/Commands';
 
     export let command: Command;
@@ -8,7 +8,7 @@
 <tr class="command">
     <td class="symbol">{command.symbol}</td>
     <td class="shortcut"><em>{toShortcut(command)}</em></td>
-    <td class="description">{command.description($locale)}</td>
+    <td class="description">{$locales.get(command.description)}</td>
 </tr>
 
 <style>
diff --git a/src/components/project/CreatorList.svelte b/src/components/project/CreatorList.svelte
index 27d852198..77584124a 100644
--- a/src/components/project/CreatorList.svelte
+++ b/src/components/project/CreatorList.svelte
@@ -1,7 +1,7 @@
 <!-- A modifiable list of creators -->
 <script lang="ts">
     import type { Creator } from '../../db/CreatorDatabase';
-    import { DB, locale } from '../../db/Database';
+    import { DB, locales } from '../../db/Database';
     import validateEmail from '../../db/validEmail';
     import CreatorView from '../app/CreatorView.svelte';
     import Feedback from '../app/Feedback.svelte';
@@ -50,18 +50,26 @@
     <form class="form" on:submit={addCreator}>
         <TextField
             bind:text={email}
-            placeholder={$locale.ui.dialog.share.field.email.placeholder}
-            description={$locale.ui.dialog.share.field.email.description}
+            placeholder={$locales.get(
+                (l) => l.ui.dialog.share.field.email.placeholder
+            )}
+            description={$locales.get(
+                (l) => l.ui.dialog.share.field.email.description
+            )}
             validator={validateEmail}
         />
         <Button
-            tip={$locale.ui.dialog.share.button.submit}
+            tip={$locales.get((l) => l.ui.dialog.share.button.submit)}
             active={validCollaborator(email)}
             action={() => undefined}>&gt;</Button
         >
         {#if adding}<Spinning label="" />{/if}
         {#if unknown}
-            <Feedback>{$locale.ui.dialog.share.error.unknown}</Feedback>{/if}
+            <Feedback
+                >{$locales.get(
+                    (l) => l.ui.dialog.share.error.unknown
+                )}</Feedback
+            >{/if}
     </form>
 {/if}
 
@@ -72,7 +80,9 @@
                     {anonymize}
                     {creator}
                 />{:else}?{/if}{#if editable}<Button
-                    tip={$locale.ui.project.button.removeCollaborator}
+                    tip={$locales.get(
+                        (l) => l.ui.project.button.removeCollaborator
+                    )}
                     active={removable(uid)}
                     action={() => remove(uid)}>⨉</Button
                 >{/if}</div
diff --git a/src/components/project/Help.svelte b/src/components/project/Help.svelte
index 0a6bbed52..6213ef6d7 100644
--- a/src/components/project/Help.svelte
+++ b/src/components/project/Help.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import Commands, { Category } from '../editor/util/Commands';
     import Dialog from '../widgets/Dialog.svelte';
     import CommandDescription from './CommandDescription.svelte';
@@ -7,26 +7,39 @@
     export let show: boolean;
 </script>
 
-<Dialog bind:show description={$locale.ui.dialog.help}>
+<Dialog bind:show description={$locales.get((l) => l.ui.dialog.help)}>
     <table>
         <td colspan="3"
-            ><h1>{$locale.ui.dialog.help.subheader.moveCursor}</h1></td
+            ><h1
+                >{$locales.get(
+                    (l) => l.ui.dialog.help.subheader.moveCursor
+                )}</h1
+            ></td
         >
         {#each Commands.filter((c) => c.category === Category.Cursor) as command}
             <CommandDescription {command} />
         {/each}
-        <td colspan="3"><h1>{$locale.ui.dialog.help.subheader.editCode}</h1></td
+        <td colspan="3"
+            ><h1>{$locales.get((l) => l.ui.dialog.help.subheader.editCode)}</h1
+            ></td
         >
         {#each Commands.filter((c) => c.category === Category.Modify) as command}
             <CommandDescription {command} />
         {/each}
         <td colspan="3"
-            ><h1>{$locale.ui.dialog.help.subheader.insertCode}</h1></td
+            ><h1
+                >{$locales.get(
+                    (l) => l.ui.dialog.help.subheader.insertCode
+                )}</h1
+            ></td
         >
         {#each Commands.filter((c) => c.category === Category.Insert) as command}
             <CommandDescription {command} />
         {/each}
-        <td colspan="3"><h1>{$locale.ui.dialog.help.subheader.debug}</h1></td>
+        <td colspan="3"
+            ><h1>{$locales.get((l) => l.ui.dialog.help.subheader.debug)}</h1
+            ></td
+        >
         {#each Commands.filter((c) => c.category === Category.Evaluate) as command}
             <CommandDescription {command} />
         {/each}
diff --git a/src/components/project/Moderation.svelte b/src/components/project/Moderation.svelte
index be3c2181e..6ae32caa0 100644
--- a/src/components/project/Moderation.svelte
+++ b/src/components/project/Moderation.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import Dialog from '@components/widgets/Dialog.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import type Project from '../../models/Project';
     import { getUser } from './Contexts';
     import {
@@ -18,9 +18,9 @@
 
     /** See if this is a public project being viewed by someone who isn't a creator or collaborator */
     $: audience = isAudience($user, project);
-    $: warnings = getWarnings(project.getFlags(), $locale);
-    $: blocks = getBlocks(project.getFlags(), $locale);
-    $: unmoderated = getUnmoderated(project.getFlags(), $locale);
+    $: warnings = getWarnings(project.getFlags(), $locales.getLocale());
+    $: blocks = getBlocks(project.getFlags(), $locales.getLocale());
+    $: unmoderated = getUnmoderated(project.getFlags(), $locales.getLocale());
 </script>
 
 <!-- If this is an audience member and one of the flags are active -->
@@ -28,10 +28,10 @@
     <Dialog
         bind:show
         description={blocks.length > 0
-            ? $locale.moderation.blocked
+            ? $locales.getLocale().moderation.blocked
             : warnings.length > 0
-            ? $locale.moderation.warning
-            : $locale.moderation.unmoderated}
+            ? $locales.getLocale().moderation.warning
+            : $locales.getLocale().moderation.unmoderated}
         closeable={blocks.length === 0}
     >
         <ul>
diff --git a/src/components/project/NonSourceTileToggle.svelte b/src/components/project/NonSourceTileToggle.svelte
index 0e81c18e8..efe40da48 100644
--- a/src/components/project/NonSourceTileToggle.svelte
+++ b/src/components/project/NonSourceTileToggle.svelte
@@ -2,7 +2,7 @@
     import { createEventDispatcher } from 'svelte';
     import Toggle from '../widgets/Toggle.svelte';
     import type Tile from './Tile';
-    import { locale } from '../../db/Database';
+    import { locales } from '@db/Database';
 
     export let tile: Tile;
 
@@ -11,7 +11,7 @@
 
 <Toggle
     uiid="{tile.id}Expand"
-    tips={$locale.ui.tile.toggle.show}
+    tips={$locales.get((l) => l.ui.tile.toggle.show)}
     on={tile.isExpanded()}
     toggle={() => dispatch('toggle')}>{tile.name}</Toggle
 >
diff --git a/src/components/project/ProjectView.svelte b/src/components/project/ProjectView.svelte
index 7e0df298e..ffde048cb 100644
--- a/src/components/project/ProjectView.svelte
+++ b/src/components/project/ProjectView.svelte
@@ -76,16 +76,13 @@
     import type PaintingConfiguration from '../output/PaintingConfiguration';
     import {
         DB,
-        locale,
         locales,
         arrangement,
-        languages,
         camera,
         mic,
         Settings,
         Projects,
         writingLayout,
-        writingDirection,
         blocks,
         Creators,
     } from '../../db/Database';
@@ -376,9 +373,7 @@
                 if (source)
                     newTiles.push(
                         tile
-                            .withName(
-                                source.names.getPreferredNameString($locales)
-                            )
+                            .withName($locales.getName(source.names))
                             // If playing, keep the source files collapsed
                             .withMode(playing ? Mode.Collapsed : tile.mode)
                     );
@@ -406,7 +401,7 @@
 
         return new Tile(
             Layout.getSourceID(index),
-            source.names.getPreferredNameString($locales),
+            $locales.getName(source.names),
             TileKind.Source,
             index === 0 || expandNewTile ? Mode.Expanded : Mode.Collapsed,
             undefined,
@@ -496,10 +491,10 @@
         // Set the URL to reflect the latest concept selected.
         if ($path && $path.length > 0) {
             const concept = $path[$path.length - 1];
-            const name = concept.getName($locale, false);
+            const name = concept.getName($locales, false);
             const ownerName = $index
                 ?.getConceptOwner(concept)
-                ?.getName($locale, false);
+                ?.getName($locales, false);
 
             searchParams.set(
                 PROJECT_PARAM_CONCEPT,
@@ -544,7 +539,7 @@
     let paintingConfig: PaintingConfiguration = {
         characters: 'a',
         size: 1,
-        font: $locale.ui.font.app,
+        font: $locales.get((l) => l.ui.font.app),
     };
 
     /** Set up project wide concept index and path context */
@@ -696,7 +691,7 @@
     /** When the program steps language changes, get the latest value of the program's evaluation. */
     $: {
         $evaluation;
-        $languages;
+        $locales;
         // We don't use the source we compute in the reaction above because we want this to be based only
         // on the current evaluator. This is because we sometimes evaluate some time after updating the project
         // for typing responsiveness.
@@ -739,6 +734,7 @@
     $: menuPosition = menu ? getMenuPosition(menu.getCaret()) : undefined;
 
     afterUpdate(() => {
+        const direction = $locales.getDirection();
         /** After each update, measure an outline of the node view in the drag container. */
         const nodeView = dragContainer?.querySelector('.node-view');
         if (nodeView instanceof HTMLElement && $blocks === false)
@@ -746,15 +742,13 @@
                 types: ['dragging'],
                 outline: getOutlineOf(
                     nodeView,
-                    $writingDirection === 'rtl' ||
-                        $writingLayout === 'vertical-rl',
-                    $writingDirection === 'rtl'
+                    direction === 'rtl' || $writingLayout === 'vertical-rl',
+                    direction === 'rtl'
                 ),
                 underline: getUnderlineOf(
                     nodeView,
-                    $writingDirection === 'rtl' ||
-                        $writingLayout === 'vertical-rl',
-                    $writingDirection === 'rtl'
+                    direction === 'rtl' || $writingLayout === 'vertical-rl',
+                    direction === 'rtl'
                 ),
             };
     });
@@ -1119,7 +1113,9 @@
 
     function addSource() {
         const newProject = project.withNewSource(
-            `${$locale.term.source}${project.getSupplements().length + 1}`
+            `${$locales.get((l) => l.term.source)}${
+                project.getSupplements().length + 1
+            }`
         );
 
         // Remember this new source so when we compute the new layout, we can remember to expand it initially.
@@ -1137,7 +1133,10 @@
         if (!isName(name)) return;
         const source = getSourceByID(id);
         Projects.reviseProject(
-            project.withSource(source, source.withName(name, $locales[0]))
+            project.withSource(
+                source,
+                source.withName(name, $locales.getLocales()[0])
+            )
         );
     }
 
@@ -1243,11 +1242,17 @@
                                     <!-- Can't delete main. -->
                                     {#if editable && source !== project.getMain()}
                                         <ConfirmButton
-                                            tip={$locale.ui.source.confirm
-                                                .delete.description}
+                                            tip={$locales.get(
+                                                (l) =>
+                                                    l.ui.source.confirm.delete
+                                                        .description
+                                            )}
                                             action={() => removeSource(source)}
-                                            prompt={$locale.ui.source.confirm
-                                                .delete.prompt}>⨉</ConfirmButton
+                                            prompt={$locales.get(
+                                                (l) =>
+                                                    l.ui.source.confirm.delete
+                                                        .prompt
+                                            )}>⨉</ConfirmButton
                                         >
                                     {/if}
                                 {/if}
@@ -1258,8 +1263,11 @@
                                     <CommandButton command={Restart} />
                                     {#if playing && editable}<Button
                                             uiid="editProject"
-                                            tip={$locale.ui.page.projects.button
-                                                .editproject}
+                                            tip={$locales.get(
+                                                (l) =>
+                                                    l.ui.page.projects.button
+                                                        .editproject
+                                            )}
                                             action={() => stopPlaying()}
                                             >{EDIT_SYMBOL}</Button
                                         >{/if}
@@ -1268,18 +1276,24 @@
                                             bind:painting
                                         />{/if} -->
                                     <Toggle
-                                        tips={$locale.ui.output.toggle.grid}
+                                        tips={$locales.get(
+                                            (l) => l.ui.output.toggle.grid
+                                        )}
                                         on={grid}
                                         toggle={() => (grid = !grid)}>▦</Toggle
                                     ><Toggle
-                                        tips={$locale.ui.output.toggle.fit}
+                                        tips={$locales.get(
+                                            (l) => l.ui.output.toggle.fit
+                                        )}
                                         on={fit}
                                         toggle={() => (fit = !fit)}
                                         >{#if fit}🔒{:else}🔓{/if}</Toggle
                                     >
                                 {:else if tile.isSource()}
                                     <Toggle
-                                        tips={$locale.ui.source.toggle.blocks}
+                                        tips={$locales.get(
+                                            (l) => l.ui.source.toggle.blocks
+                                        )}
                                         on={$blocks}
                                         command={ToggleBlocks}
                                         toggle={toggleBlocks}
@@ -1366,13 +1380,14 @@
         <nav class="footer">
             {#if original}<Button
                     uiid="revertProject"
-                    tip={$locale.ui.project.button.revert}
+                    tip={$locales.get((l) => l.ui.project.button.revert)}
                     active={!project.equals(original)}
                     action={() => revert()}>↺</Button
                 >{/if}
             {#if !editable}
-                <Button tip={$locale.ui.project.button.duplicate} action={copy}
-                    ><span class="copy">✐+</span></Button
+                <Button
+                    tip={$locales.get((l) => l.ui.project.button.duplicate)}
+                    action={copy}><span class="copy">✐+</span></Button
                 >
                 {@const owner = project.getOwner()}
                 {#if owner}
@@ -1384,26 +1399,33 @@
                 {/if}
             {:else}
                 <Button
-                    tip={$locale.ui.project.button.showCollaborators}
+                    tip={$locales.get(
+                        (l) => l.ui.project.button.showCollaborators
+                    )}
                     action={() =>
                         (showCollaboratorsDialog = !showCollaboratorsDialog)}
                     ><Warning>
                         {#if project.isPublic()}{#if isFlagged(project.getFlags())}‼️{:else}🌐{/if}
-                            {$locale.ui.dialog.share.mode.public
-                                .modes[1]}{:else}🤫 {$locale.ui.dialog.share
-                                .mode.public.modes[0]}{/if}</Warning
+                            {$locales.get((l) => l.ui.dialog.share.mode.public)
+                                .modes[1]}{:else}🤫 {$locales.get(
+                                (l) => l.ui.dialog.share
+                            ).mode.public.modes[0]}{/if}</Warning
                     ></Button
                 >
                 <Button
-                    tip={$locale.ui.project.button.copy}
+                    tip={$locales.get((l) => l.ui.project.button.copy)}
                     action={() => toClipboard(project.toWordplay())}>📚</Button
                 >
             {/if}
 
             {#if editable}<TextField
                     text={project.getName()}
-                    description={$locale.ui.project.field.name.description}
-                    placeholder={$locale.ui.project.field.name.placeholder}
+                    description={$locales.get(
+                        (l) => l.ui.project.field.name.description
+                    )}
+                    placeholder={$locales.get(
+                        (l) => l.ui.project.field.name.placeholder
+                    )}
                     changed={(name) =>
                         Projects.reviseProject(project.withName(name))}
                 />{:else}{project.getName()}{/if}
@@ -1427,16 +1449,18 @@
             {#if editable}
                 <Button
                     uiid="addSource"
-                    tip={$locale.ui.project.button.addSource}
+                    tip={$locales.get((l) => l.ui.project.button.addSource)}
                     action={addSource}>+</Button
                 >{/if}
             {#if overwritten}
-                <span class="overwritten">{$locale.ui.source.overwritten}</span>
+                <span class="overwritten"
+                    >{$locales.get((l) => l.ui.source.overwritten)}</span
+                >
             {/if}
             <span class="help">
                 <ProjectLanguages {project} />
                 <Button
-                    tip={ShowKeyboardHelp.description($locale)}
+                    tip={$locales.get(ShowKeyboardHelp.description)}
                     action={() => (showHelpDialog = true)}
                     >{ShowKeyboardHelp.symbol}</Button
                 ></span
diff --git a/src/components/project/Public.svelte b/src/components/project/Public.svelte
index 04e14740c..8d8a8b796 100644
--- a/src/components/project/Public.svelte
+++ b/src/components/project/Public.svelte
@@ -2,7 +2,7 @@
     import Subheader from '@components/app/Subheader.svelte';
     import MarkupHtmlView from '@components/concepts/MarkupHTMLView.svelte';
     import Mode from '@components/widgets/Mode.svelte';
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
     import {
         getBlocks,
         getWarnings,
@@ -15,23 +15,29 @@
     export let flags: Moderation | undefined = undefined;
 </script>
 
-<Subheader>{$locale.ui.dialog.share.subheader.public.header}</Subheader>
-<MarkupHtmlView markup={$locale.ui.dialog.share.subheader.public.explanation} />
+<Subheader
+    >{$locales.get((l) => l.ui.dialog.share.subheader.public.header)}</Subheader
+>
+<MarkupHtmlView
+    markup={$locales.get((l) => l.ui.dialog.share.subheader.public.explanation)}
+/>
 
 <MarkupHtmlView
-    markup={Object.values($locale.moderation.flags)
+    markup={Object.values($locales.get((l) => l.moderation.flags))
         .map((promise) => `• ${promise}`)
         .join('\n\n')}
 />
 {#if flags === undefined || Object.values(flags).every((state) => state === null)}
-    <MarkupHtmlView markup={$locale.ui.page.rights.consequences} />
+    <MarkupHtmlView
+        markup={$locales.get((l) => l.ui.page.rights.consequences)}
+    />
 {:else if flags !== undefined}
-    {@const blocked = getBlocks(flags, $locale)}
-    {@const warnings = getWarnings(flags, $locale)}
+    {@const blocked = getBlocks(flags, $locales.getLocale())}
+    {@const warnings = getWarnings(flags, $locales.getLocale())}
     {#if blocked.length > 0}
         <Warning
             ><MarkupHtmlView
-                markup={$locale.moderation.blocked.explanation}
+                markup={$locales.get((l) => l.moderation.blocked.explanation)}
             /></Warning
         >
     {/if}
@@ -43,7 +49,7 @@
     {#if warnings.length > 0}
         <Warning
             ><MarkupHtmlView
-                markup={$locale.moderation.warning.explanation}
+                markup={$locales.get((l) => l.moderation.warning.explanation)}
             /></Warning
         >
     {/if}
@@ -55,12 +61,12 @@
 {/if}
 <p>
     <Mode
-        descriptions={$locale.ui.dialog.share.mode.public}
+        descriptions={$locales.get((l) => l.ui.dialog.share.mode.public)}
         choice={isPublic ? 1 : 0}
         select={set}
         modes={[
-            '🤫 ' + $locale.ui.dialog.share.mode.public.modes[0],
-            '🌐 ' + $locale.ui.dialog.share.mode.public.modes[1],
+            '🤫 ' + $locales.get((l) => l.ui.dialog.share.mode.public.modes[0]),
+            '🌐 ' + $locales.get((l) => l.ui.dialog.share.mode.public.modes[1]),
         ]}
     /></p
 >
diff --git a/src/components/project/RootView.svelte b/src/components/project/RootView.svelte
index 2202fde27..968819731 100644
--- a/src/components/project/RootView.svelte
+++ b/src/components/project/RootView.svelte
@@ -21,7 +21,7 @@
     import Source from '@nodes/Source';
     import Name from '@nodes/Name';
     import Program from '@nodes/Program';
-    import { languages } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import TextLiteral from '../../nodes/TextLiteral';
     import FormattedLiteral from '../../nodes/FormattedLiteral';
 
@@ -105,16 +105,18 @@
                 const tags = tagged.getTags();
                 // If at least one is visible, hide all those not in a preferred language.
                 if (
-                    $languages.some((lang) =>
-                        tags.some((l) => l.getLanguage() === lang)
-                    )
+                    $locales
+                        .getLanguages()
+                        .some((lang) =>
+                            tags.some((l) => l.getLanguage() === lang)
+                        )
                 ) {
                     let first = false;
                     for (const nameOrDoc of tags) {
                         const caretIn = $caret?.isIn(nameOrDoc, true);
-                        const selectedLocale = $languages.some(
-                            (t) => t === nameOrDoc.getLanguage()
-                        );
+                        const selectedLocale = $locales
+                            .getLanguages()
+                            .some((t) => t === nameOrDoc.getLanguage());
                         // Not a selected language and not in the node? Hide it.
                         if (!selectedLocale && !caretIn)
                             newHidden.add(nameOrDoc);
diff --git a/src/components/project/SourceTileToggle.svelte b/src/components/project/SourceTileToggle.svelte
index efeb52592..0db7b9762 100644
--- a/src/components/project/SourceTileToggle.svelte
+++ b/src/components/project/SourceTileToggle.svelte
@@ -2,10 +2,9 @@
     import { createEventDispatcher } from 'svelte';
     import type Source from '@nodes/Source';
     import { getConflicts } from './Contexts';
-    import { locales } from '../../db/Database';
     import Glyphs from '../../lore/Glyphs';
     import Toggle from '../widgets/Toggle.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let source: Source;
     export let expanded: boolean;
@@ -37,7 +36,7 @@
 </script>
 
 <Toggle
-    tips={$locale.ui.tile.toggle.show}
+    tips={$locales.get((l) => l.ui.tile.toggle.show)}
     on={expanded}
     toggle={() => dispatch('toggle')}
 >
@@ -46,7 +45,7 @@
         >{/if}
     {#if primaryCount === 0 && secondaryCount === 0}{Glyphs.Program
             .symbols}{/if}
-    {source.names.getPreferredNameString($locales)}
+    {$locales.getName(source.names)}
 </Toggle>
 
 <style>
diff --git a/src/components/project/TileView.svelte b/src/components/project/TileView.svelte
index eb1d7feff..5819e703b 100644
--- a/src/components/project/TileView.svelte
+++ b/src/components/project/TileView.svelte
@@ -19,7 +19,7 @@
     import type Layout from './Layout';
     import TextField from '../widgets/TextField.svelte';
     import { isName } from '../../parser/Tokenizer';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import { onMount } from 'svelte';
     import Arrangement from '../../db/Arrangement';
     import Glyphs from '../../lore/Glyphs';
@@ -203,8 +203,12 @@
                     {Glyphs.Program.symbols}
                     <TextField
                         text={tile.name}
-                        description={$locale.ui.source.field.name.description}
-                        placeholder={$locale.ui.source.field.name.placeholder}
+                        description={$locales.get(
+                            (l) => l.ui.source.field.name.description
+                        )}
+                        placeholder={$locales.get(
+                            (l) => l.ui.source.field.name.placeholder
+                        )}
                         validator={(text) => isName(text)}
                         changed={handleRename}
                     />
@@ -216,7 +220,7 @@
             <div class="toolbar">
                 <slot name="extra" />
                 <Toggle
-                    tips={$locale.ui.tile.toggle.fullscreen}
+                    tips={$locales.get((l) => l.ui.tile.toggle.fullscreen)}
                     on={fullscreen}
                     command={fullscreen ? ExitFullscreen : EnterFullscreen}
                     toggle={() =>
@@ -245,7 +249,7 @@
                     >
                 </Toggle>
                 <Button
-                    tip={$locale.ui.tile.button.collapse}
+                    tip={$locales.get((l) => l.ui.tile.button.collapse)}
                     action={() => dispatch('mode', { mode: Mode.Collapsed })}
                     active={!layout.isFullscreen()}>–</Button
                 >
diff --git a/src/components/settings/LocaleChooser.svelte b/src/components/settings/LocaleChooser.svelte
index c9b263412..6ec71dfd7 100644
--- a/src/components/settings/LocaleChooser.svelte
+++ b/src/components/settings/LocaleChooser.svelte
@@ -3,7 +3,7 @@
 <script lang="ts">
     import Button from '../widgets/Button.svelte';
     import { getLanguageLayout, PossibleLanguages } from '@locale/LanguageCode';
-    import { DB, locale, locales } from '../../db/Database';
+    import { DB, locales } from '@db/Database';
     import {
         SupportedLocales,
         getLocaleLanguage,
@@ -19,9 +19,9 @@
 
     let show: boolean;
 
-    $: selectedLocales = $locales.map((locale) =>
-        toLocaleString(locale)
-    ) as SupportedLocale[];
+    $: selectedLocales = $locales
+        .getLocales()
+        .map((locale) => toLocaleString(locale)) as SupportedLocale[];
 
     function select(locale: SupportedLocale) {
         selectedLocales = selectedLocales.includes(locale)
@@ -52,18 +52,18 @@
     }
 </script>
 
-<Dialog bind:show description={$locale.ui.dialog.locale}>
+<Dialog bind:show description={$locales.get((l) => l.ui.dialog.locale)}>
     <h2
         >{concretize(
-            $locale,
-            $locale.ui.dialog.locale.subheader.selected
+            $locales,
+            $locales.get((l) => l.ui.dialog.locale.subheader.selected)
         ).toText()}</h2
     >
     <div class="languages">
         {#each selectedLocales as selected}
             <Button
                 action={() => select(selected)}
-                tip={$locale.ui.dialog.locale.button.remove}
+                tip={$locales.get((l) => l.ui.dialog.locale.button.remove)}
                 active={selectedLocales.length > 1}
                 >{#if selectedLocales.length > 1}
                     ⨉
@@ -73,15 +73,15 @@
     </div>
     <h2
         >{concretize(
-            $locale,
-            $locale.ui.dialog.locale.subheader.supported
+            $locales,
+            $locales.get((l) => l.ui.dialog.locale.subheader.supported)
         ).toText()}</h2
     >
     <div class="languages">
         {#each SupportedLocales.filter((supported) => !selectedLocales.some((locale) => locale === supported)) as supported}
             <Button
                 action={() => select(supported)}
-                tip={$locale.ui.dialog.locale.button.add}
+                tip={$locales.get((l) => l.ui.dialog.locale.button.add)}
                 >+ <LocaleName locale={supported} supported /></Button
             >
         {:else}&mdash;
@@ -92,8 +92,8 @@
             external
             to="https://github.com/amyjko/wordplay/blob/main/CONTRIBUTING.md#localization"
             >{concretize(
-                $locale,
-                $locale.ui.dialog.locale.subheader.help
+                $locales,
+                $locales.get((l) => l.ui.dialog.locale.subheader.help)
             ).toText()}</Link
         ></h2
     >
@@ -103,7 +103,10 @@
         {/each}
     </div>
 </Dialog>
-<Button tip={$locale.ui.dialog.locale.button.show} action={() => (show = true)}>
+<Button
+    tip={$locales.get((l) => l.ui.dialog.locale.button.show)}
+    action={() => (show = true)}
+>
     <span class="chosen">
         {#each selectedLocales as locale, index}{#if index > 0}+{/if}<LocaleName
                 {locale}
diff --git a/src/components/settings/Settings.svelte b/src/components/settings/Settings.svelte
index 57534b740..ef2875929 100644
--- a/src/components/settings/Settings.svelte
+++ b/src/components/settings/Settings.svelte
@@ -4,7 +4,7 @@
     import { getUser } from '../project/Contexts';
     import {
         animationFactor,
-        locale,
+        locales,
         arrangement,
         camera,
         mic,
@@ -72,10 +72,16 @@
         />
     </Link>
     <LanguageChooser />
-    <Dialog bind:show width="50vw" description={$locale.ui.dialog.settings}>
+    <Dialog
+        bind:show
+        width="50vw"
+        description={$locales.get((l) => l.ui.dialog.settings)}
+    >
         <p
             ><Mode
-                descriptions={$locale.ui.dialog.settings.mode.layout}
+                descriptions={$locales.get(
+                    (l) => l.ui.dialog.settings.mode.layout
+                )}
                 choice={$arrangement === Arrangement.Responsive
                     ? 0
                     : $arrangement === Arrangement.Horizontal
@@ -98,7 +104,9 @@
         >
         <p
             ><Mode
-                descriptions={$locale.ui.dialog.settings.mode.animate}
+                descriptions={$locales.get(
+                    (l) => l.ui.dialog.settings.mode.animate
+                )}
                 choice={$animationFactor}
                 select={(choice) => Settings.setAnimationFactor(choice)}
                 modes={['🧘🏽‍♀️', '🏃‍♀️', '½', '⅓', '¼']}
@@ -106,7 +114,9 @@
         >
         <p
             ><Mode
-                descriptions={$locale.ui.dialog.settings.mode.writing}
+                descriptions={$locales.get(
+                    (l) => l.ui.dialog.settings.mode.writing
+                )}
                 choice={$writingLayout === 'horizontal-tb'
                     ? 0
                     : $writingLayout === 'vertical-rl'
@@ -176,7 +186,9 @@
         {/if}
         <p
             ><Mode
-                descriptions={$locale.ui.dialog.settings.mode.dark}
+                descriptions={$locales.get(
+                    (l) => l.ui.dialog.settings.mode.dark
+                )}
                 choice={$dark === false ? 0 : $dark === true ? 1 : 2}
                 select={(choice) =>
                     Settings.setDark(
@@ -187,7 +199,7 @@
         </p>
     </Dialog>
     <Button
-        tip={$locale.ui.dialog.settings.button.show}
+        tip={$locales.get((l) => l.ui.dialog.settings.button.show)}
         action={() => (show = !show)}>⚙</Button
     >
 </div>
diff --git a/src/components/values/ExceptionView.svelte b/src/components/values/ExceptionView.svelte
index 8e2895c1e..38d063400 100644
--- a/src/components/values/ExceptionView.svelte
+++ b/src/components/values/ExceptionView.svelte
@@ -2,7 +2,7 @@
 
 <script lang="ts">
     import type ExceptionValue from '@values/ExceptionValue';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import concretize from '../../locale/concretize';
 
     export let value: ExceptionValue;
@@ -10,5 +10,5 @@
 </script>
 
 {#if inline || !inline}
-    ! {value.getDescription(concretize, $locale).toText()}
+    ! {value.getDescription(concretize, $locales).toText()}
 {/if}
diff --git a/src/components/values/FunctionView.svelte b/src/components/values/FunctionView.svelte
index be0efb9af..26e33aafb 100644
--- a/src/components/values/FunctionView.svelte
+++ b/src/components/values/FunctionView.svelte
@@ -5,7 +5,7 @@
     import SymbolView from './SymbolView.svelte';
     import { FUNCTION_SYMBOL } from '@parser/Symbols';
     import Sym from '@nodes/Sym';
-    import { locales } from '../../db/Database';
+    import { locales } from '@db/Database';
 
     export let value: FunctionValue;
     export let inline = true;
@@ -14,7 +14,7 @@
 {#if inline || !inline}
     <SymbolView symbol={FUNCTION_SYMBOL} type={Sym.Function} />
     <SymbolView
-        symbol={value.definition.names.getPreferredNameString($locales)}
+        symbol={$locales.getName(value.definition.names)}
         type={Sym.Name}
     />
 {/if}
diff --git a/src/components/values/StreamDefinitionView.svelte b/src/components/values/StreamDefinitionView.svelte
index 33b4efbfe..ab530263d 100644
--- a/src/components/values/StreamDefinitionView.svelte
+++ b/src/components/values/StreamDefinitionView.svelte
@@ -15,6 +15,6 @@
         symbol={STREAM_SYMBOL}
         type={Sym.Stream}
     /><SymbolView
-        symbol={value.definition.names.getPreferredNameString($locales)}
+        symbol={$locales.getName(value.definition.names)}
         type={Sym.Name}
     />{/if}
diff --git a/src/components/values/StructureDefinitionView.svelte b/src/components/values/StructureDefinitionView.svelte
index 08d5b41c6..803aa7d16 100644
--- a/src/components/values/StructureDefinitionView.svelte
+++ b/src/components/values/StructureDefinitionView.svelte
@@ -15,6 +15,6 @@
         symbol={TYPE_SYMBOL}
         type={Sym.Type}
     /><SymbolView
-        symbol={value.definition.names.getPreferredNameString($locales)}
+        symbol={$locales.getName(value.definition.names)}
         type={Sym.Name}
     />{/if}
diff --git a/src/components/values/StructureView.svelte b/src/components/values/StructureView.svelte
index a444ba42d..6d07dcc8d 100644
--- a/src/components/values/StructureView.svelte
+++ b/src/components/values/StructureView.svelte
@@ -22,12 +22,12 @@
 <!-- Inline structures show the name and binds -->
 {#if inline}
     <SymbolView
-        symbol={value.type.names.getPreferredNameString($locales)}
+        symbol={$locales.getName(value.type.names)}
         type={Sym.Name}
     /><SymbolView symbol={EVAL_OPEN_SYMBOL} type={Sym.EvalOpen} /><Expandable
         ><svelte:fragment slot="expanded">
             {#each value.type.inputs as input, index}<SymbolView
-                    symbol={input.names.getPreferredNameString($locales)}
+                    symbol={$locales.getName(input.names)}
                     type={Sym.Name}
                 /><SymbolView symbol={BIND_SYMBOL} type={Sym.Bind} /><ValueView
                     value={value.resolve(input.getNames()[0]) ??
@@ -52,7 +52,7 @@
         <tr
             ><th colspan={color ? 1 : 2}
                 ><SymbolView
-                    symbol={value.type.names.getPreferredNameString($locales)}
+                    symbol={$locales.getName(value.type.names)}
                     type={Sym.Name}
                 /></th
             >{#if color}
@@ -67,7 +67,7 @@
         {#each value.type.inputs as input}<tr
                 ><td
                     ><SymbolView
-                        symbol={input.names.getPreferredNameString($locales)}
+                        symbol={$locales.getName(input.names)}
                         type={Sym.Name}
                     /></td
                 ><td
diff --git a/src/components/values/TableView.svelte b/src/components/values/TableView.svelte
index 67467863e..65d0c5c9a 100644
--- a/src/components/values/TableView.svelte
+++ b/src/components/values/TableView.svelte
@@ -24,7 +24,7 @@
         symbol={TABLE_OPEN_SYMBOL}
         type={Sym.TableOpen}
     />{#each value.type.columns as col}{' '}<SymbolView
-            symbol={col ? col.names.getPreferredNameString($locales) : ''}
+            symbol={col ? $locales.getName(col.names) : ''}
             type={Sym.Name}
         />{/each}{' '}<SymbolView
         symbol={TABLE_CLOSE_SYMBOL}
@@ -63,9 +63,7 @@
         <tr>
             {#each value.type.columns as col}{' '}<td
                     ><SymbolView
-                        symbol={col
-                            ? col.names.getPreferredNameString($locales)
-                            : ''}
+                        symbol={col ? $locales.getName(col.names) : ''}
                         type={Sym.Name}
                     /></td
                 >{/each}
diff --git a/src/components/widgets/ColorChooser.svelte b/src/components/widgets/ColorChooser.svelte
index 7edbe7854..85965e264 100644
--- a/src/components/widgets/ColorChooser.svelte
+++ b/src/components/widgets/ColorChooser.svelte
@@ -54,9 +54,9 @@
 </script>
 
 <script lang="ts">
-    import { locale } from '../../db/Database';
-    import { getFirstName } from '../../locale/Locale';
+    import { locales } from '../../db/Database';
     import Button from './Button.svelte';
+    import { getFirstName } from '../../locale/Locale';
 
     /** a degree (any number remainder 360) */
     export let hue: number;
@@ -138,7 +138,9 @@
             min={0}
             max={1}
             increment={0.01}
-            tip={getFirstName($locale.output.Color.lightness.names)}
+            tip={$locales.get((l) =>
+                getFirstName(l.output.Color.lightness.names)
+            )}
             unit={'%'}
             precision={0}
             change={(value) => {
@@ -153,7 +155,7 @@
             max={150}
             increment={1}
             unit=""
-            tip={getFirstName($locale.output.Color.chroma.names)}
+            tip={$locales.get((l) => getFirstName(l.output.Color.chroma.names))}
             change={(value) => {
                 chroma = value.round().toNumber();
                 broadcast();
@@ -166,7 +168,7 @@
             max={360}
             increment={1}
             unit={'°'}
-            tip={getFirstName($locale.output.Color.hue.names)}
+            tip={$locales.get((l) => getFirstName(l.output.Color.hue.names))}
             change={(value) => {
                 hue = value.round().toNumber();
                 broadcast();
diff --git a/src/components/widgets/CommandButton.svelte b/src/components/widgets/CommandButton.svelte
index dfad024b2..7083050a8 100644
--- a/src/components/widgets/CommandButton.svelte
+++ b/src/components/widgets/CommandButton.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
     import { toShortcut, type Command } from '../editor/util/Commands';
     import Button from './Button.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import {
         IdleKind,
         getEditors,
@@ -36,7 +36,7 @@
 </script>
 
 <Button
-    tip={command.description($locale) + ` (${toShortcut(command)})`}
+    tip={$locales.get(command.description) + ` (${toShortcut(command)})`}
     bind:view
     uiid={command.uiid}
     {active}
diff --git a/src/components/widgets/ConfirmButton.svelte b/src/components/widgets/ConfirmButton.svelte
index 37a5ebc52..51246314e 100644
--- a/src/components/widgets/ConfirmButton.svelte
+++ b/src/components/widgets/ConfirmButton.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { locale } from '../../db/Database';
+    import { locales } from '@db/Database';
     import Button, { type Action } from './Button.svelte';
 
     export let tip: string;
@@ -14,7 +14,7 @@
 <div class="prompt" class:confirming>
     <Button
         {background}
-        tip={confirming ? $locale.ui.widget.confirm.cancel : tip}
+        tip={confirming ? $locales.get((l) => l.ui.widget.confirm.cancel) : tip}
         action={() => (confirming = !confirming)}
         active={enabled}
         >{#if confirming}⨉{:else}<slot />{/if}</Button
diff --git a/src/components/widgets/Dialog.svelte b/src/components/widgets/Dialog.svelte
index 774d39501..8368658c1 100644
--- a/src/components/widgets/Dialog.svelte
+++ b/src/components/widgets/Dialog.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import { onMount, tick } from 'svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import Button from './Button.svelte';
     import type { DialogText } from '../../locale/UITexts';
     import Header from '../app/Header.svelte';
@@ -50,7 +50,7 @@
         {#if closeable}
             <div class="close">
                 <Button
-                    tip={$locale.ui.widget.dialog.close}
+                    tip={$locales.get((l) => l.ui.widget.dialog.close)}
                     action={() => (show = false)}>❌</Button
                 >
             </div>
diff --git a/src/components/widgets/Note.svelte b/src/components/widgets/Note.svelte
index d5f605078..9941a0d8e 100644
--- a/src/components/widgets/Note.svelte
+++ b/src/components/widgets/Note.svelte
@@ -1,10 +1,11 @@
 <script lang="ts">
-    import { writingDirection } from '../../db/Database';
+    import { locales } from '../../db/Database';
 
     export let center = false;
 </script>
 
-<div class="note" class:center style:direction={$writingDirection}><slot /></div
+<div class="note" class:center style:direction={$locales.getDirection()}
+    ><slot /></div
 >
 
 <style>
diff --git a/src/concepts/BindConcept.ts b/src/concepts/BindConcept.ts
index ea8173725..b25d1bf2f 100644
--- a/src/concepts/BindConcept.ts
+++ b/src/concepts/BindConcept.ts
@@ -3,11 +3,11 @@ import type Context from '@nodes/Context';
 import type Node from '@nodes/Node';
 import Reference from '@nodes/Reference';
 import Concept from './Concept';
-import type Locale from '@locale/Locale';
 import type Purpose from './Purpose';
 import Emotion from '../lore/Emotion';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class BindConcept extends Concept {
     /** The type this concept represents. */
@@ -19,21 +19,21 @@ export default class BindConcept extends Concept {
     constructor(
         purpose: Purpose,
         bind: Bind,
-        locales: Locale[],
+        locales: Locales,
         context: Context
     ) {
         super(purpose, undefined, context);
 
         this.bind = bind;
         this.reference = Reference.make(
-            this.bind.names.getPreferredNameString(locales),
+            locales.getName(this.bind.names),
             this.bind
         );
     }
 
-    getGlyphs(locale: Locale[]) {
+    getGlyphs(locales: Locales) {
         return {
-            symbols: this.bind.names.getPreferredNameString(locale),
+            symbols: locales.getName(this.bind.names),
         };
     }
 
@@ -49,13 +49,13 @@ export default class BindConcept extends Concept {
         return this.bind.hasName(name);
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        const doc = this.bind.docs?.getPreferredLocale(locale);
-        return doc?.markup?.concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        const doc = this.bind.docs?.getPreferredLocale(locales);
+        return doc?.markup?.concretize(locales, []);
     }
 
-    getName(locale: Locale, symbolic: boolean) {
-        return this.bind.names.getPreferredNameString([locale], symbolic);
+    getName(locales: Locales, symbolic: boolean) {
+        return locales.getName(this.bind.names, symbolic);
     }
 
     getRepresentation() {
diff --git a/src/concepts/Concept.ts b/src/concepts/Concept.ts
index 00bce1a33..8c5b49d48 100644
--- a/src/concepts/Concept.ts
+++ b/src/concepts/Concept.ts
@@ -1,12 +1,12 @@
 import type Context from '@nodes/Context';
 import type Node from '@nodes/Node';
-import type Locale from '@locale/Locale';
 import type Purpose from './Purpose';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import type Glyph from '../lore/Glyph';
 import type Emotion from '../lore/Emotion';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 /**
  * Represents some part of the Wordplay language, API, or example ecosystem.
@@ -40,15 +40,15 @@ export default abstract class Concept {
     /**
      * Returns the glyph that represents the concept.
      */
-    abstract getGlyphs(locales: Locale[]): Glyph;
+    abstract getGlyphs(locales: Locales): Glyph;
 
     /** Returns the emotions for the glyphs */
-    abstract getEmotion(locale: Locale): Emotion;
+    abstract getEmotion(locales: Locales): Emotion;
 
     /**
      * Returns true if the concept has the given name or id.
      */
-    abstract hasName(name: string, translation: Locale): boolean;
+    abstract hasName(name: string, locales: Locales): boolean;
 
     /**
      * Return a node to represent the concept. Usually an example or template.
@@ -59,12 +59,12 @@ export default abstract class Concept {
      * Returns a localized creator-facing name or description to represent the concept.
      * Returns a symbolic name if asked and available.
      */
-    abstract getName(translation: Locale, symbolic: boolean): string;
+    abstract getName(locales: Locales, symbolic: boolean): string;
 
     /**
      * Returns, if available, documentation for the concept.
      */
-    abstract getDocs(translation: Locale): Markup | undefined;
+    abstract getDocs(locales: Locales): Markup | undefined;
 
     /**
      * Provides a set of Nodes that could be rendered in the UI.
@@ -90,18 +90,18 @@ export default abstract class Concept {
      * Should return true if anything about the concept matches the query text.
      */
     getTextMatching(
-        locale: Locale,
+        locales: Locales,
         query: string
     ): [string, number, number] | undefined {
-        const name = this.getName(locale, false);
-        const lowerDescription = name.toLocaleLowerCase(locale.language);
+        const name = this.getName(locales, false);
+        const lowerDescription = name.toLocaleLowerCase(locales.getLanguages());
         const index = lowerDescription.indexOf(query);
         // Return name match at priority 1
         if (index >= 0) return [name, index, 1];
-        const markup = this.getDocs(locale);
+        const markup = this.getDocs(locales);
         // If the name doesn't match, see if a doc does
         if (markup) {
-            const [match, index] = markup.getMatchingText(query, [locale]) ?? [
+            const [match, index] = markup.getMatchingText(query, locales) ?? [
                 undefined,
                 undefined,
             ];
@@ -136,7 +136,7 @@ export default abstract class Concept {
         return concepts;
     }
 
-    abstract getCharacter(locale: Locale): Character | undefined;
+    abstract getCharacter(locales: Locales): Character | undefined;
 
     abstract isEqualTo(concept: Concept): boolean;
 }
diff --git a/src/concepts/ConceptIndex.ts b/src/concepts/ConceptIndex.ts
index 422628ce2..6814c9d85 100644
--- a/src/concepts/ConceptIndex.ts
+++ b/src/concepts/ConceptIndex.ts
@@ -2,7 +2,6 @@ import type Concept from './Concept';
 import type Node from '@nodes/Node';
 import type Type from '@nodes/Type';
 import StructureConcept from './StructureConcept';
-import type Locale from '@locale/Locale';
 import Purpose from './Purpose';
 import type Project from '../models/Project';
 import StructureDefinition from '@nodes/StructureDefinition';
@@ -24,18 +23,19 @@ import BinaryEvaluate from '../nodes/BinaryEvaluate';
 import UnaryEvaluate from '../nodes/UnaryEvaluate';
 import Evaluate from '../nodes/Evaluate';
 import Reference from '../nodes/Reference';
+import type Locales from '../locale/Locales';
 
 export default class ConceptIndex {
     readonly project: Project;
     readonly concepts: Concept[];
     readonly primaryConcepts: Concept[];
     readonly subConcepts: Map<Concept, Set<Concept>> = new Map();
-    readonly locales: Locale[];
+    readonly locales: Locales;
 
     /** A mapping of node ids to nodes, registered by examples that are generated. */
     readonly examples: Map<number, Node> = new Map();
 
-    constructor(project: Project, concepts: Concept[], locales: Locale[]) {
+    constructor(project: Project, concepts: Concept[], locales: Locales) {
         this.project = project;
 
         // Store the primary concepts
@@ -57,7 +57,7 @@ export default class ConceptIndex {
     }
 
     // Make a concept index with a project and some preferreed languages.
-    static make(project: Project, locales: Locale[]) {
+    static make(project: Project, locales: Locales) {
         const main = project.getMain();
         const sources = project.getSources();
 
@@ -268,7 +268,7 @@ export default class ConceptIndex {
         const subconcepts = this.getConceptByName(owner)?.getSubConcepts();
         return subconcepts
             ? Array.from(subconcepts).find((c) =>
-                  c.hasName(concept, this.locales[0])
+                  c.hasName(concept, this.locales)
               )
             : undefined;
     }
@@ -281,7 +281,7 @@ export default class ConceptIndex {
     }
 
     getConceptByName(name: string): Concept | undefined {
-        return this.concepts.find((c) => c.hasName(name, this.locales[0]));
+        return this.concepts.find((c) => c.hasName(name, this.locales));
     }
 
     addExample(node: Node) {
@@ -298,30 +298,39 @@ export default class ConceptIndex {
     }
 
     getQuery(
-        locales: Locale[],
+        locales: Locales,
         query: string
     ): [Concept, [string, number, number][]][] {
         // Find matching concepts for each locale and the string that matched.
-        const matches = locales.reduce(
-            (matches: [Concept, [string, number, number]][], locale) => {
-                const lowerQuery = query.toLocaleLowerCase(locale.language);
-                return [
-                    ...matches,
-                    ...this.concepts
-                        .map((c) => {
-                            const match = c.getTextMatching(locale, lowerQuery);
-                            return match !== undefined ? [c, match] : undefined;
-                        })
-                        .filter(
-                            (
-                                match
-                            ): match is [Concept, [string, number, number]] =>
-                                Array.isArray(match)
-                        ),
-                ];
-            },
-            []
-        );
+        const matches = locales
+            .getLocales()
+            .reduce(
+                (matches: [Concept, [string, number, number]][], locale) => {
+                    const lowerQuery = query.toLocaleLowerCase(locale.language);
+                    return [
+                        ...matches,
+                        ...this.concepts
+                            .map((c) => {
+                                const match = c.getTextMatching(
+                                    locales,
+                                    lowerQuery
+                                );
+                                return match !== undefined
+                                    ? [c, match]
+                                    : undefined;
+                            })
+                            .filter(
+                                (
+                                    match
+                                ): match is [
+                                    Concept,
+                                    [string, number, number]
+                                ] => Array.isArray(match)
+                            ),
+                    ];
+                },
+                []
+            );
         // Collapse matching text of equivalent concepts
         const map = new Map<Concept, [string, number, number][]>();
         for (const [concept, match] of matches) {
diff --git a/src/concepts/ConversionConcept.ts b/src/concepts/ConversionConcept.ts
index 62c181063..a612bcf47 100644
--- a/src/concepts/ConversionConcept.ts
+++ b/src/concepts/ConversionConcept.ts
@@ -3,7 +3,6 @@ import type ConversionDefinition from '@nodes/ConversionDefinition';
 import Convert from '@nodes/Convert';
 import ExpressionPlaceholder from '@nodes/ExpressionPlaceholder';
 import type Node from '@nodes/Node';
-import type Locale from '@locale/Locale';
 import Emotion from '../lore/Emotion';
 import Glyphs from '../lore/Glyphs';
 import Concept from './Concept';
@@ -12,6 +11,7 @@ import type StructureConcept from './StructureConcept';
 import concretize from '../locale/concretize';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class ConversionConcept extends Concept {
     /** The function this concept represents. */
@@ -51,14 +51,14 @@ export default class ConversionConcept extends Concept {
         return false;
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        const doc = this.definition.docs?.getPreferredLocale(locale);
-        return doc?.markup?.concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        const doc = this.definition.docs?.getPreferredLocale(locales);
+        return doc?.markup?.concretize(locales, []);
     }
 
-    getName(locale: Locale) {
+    getName(locales: Locales) {
         return this.definition
-            .getDescription(concretize, locale, this.context)
+            .getDescription(concretize, locales, this.context)
             .toText();
     }
 
diff --git a/src/concepts/DefaultConcepts.ts b/src/concepts/DefaultConcepts.ts
index 66a2fa536..6b8decb91 100644
--- a/src/concepts/DefaultConcepts.ts
+++ b/src/concepts/DefaultConcepts.ts
@@ -74,7 +74,6 @@ import SetCloseToken from '../nodes/SetCloseToken';
 import SetOrMapAccess from '../nodes/SetOrMapAccess';
 import Source from '../nodes/Source';
 import NameType from '../nodes/NameType';
-import type Locale from '../locale/Locale';
 import FormattedLiteral from '../nodes/FormattedLiteral';
 import FormattedTranslation from '../nodes/FormattedTranslation';
 import IsLocale from '../nodes/IsLocale';
@@ -85,6 +84,7 @@ import Select from '../nodes/Select';
 import Update from '../nodes/Update';
 import Delete from '../nodes/Delete';
 import Translation from '../nodes/Translation';
+import type Locales from '../locale/Locales';
 
 /** These are ordered by appearance in the docs. */
 const templates: Node[] = [
@@ -258,7 +258,7 @@ export function getNodeConcepts(context: Context): NodeConcept[] {
 
 export function getBasisConcepts(
     basis: Basis,
-    locales: Locale[],
+    locales: Locales,
     context: Context
 ): StructureConcept[] {
     return [
@@ -345,7 +345,7 @@ export function getStructureOrFunctionConcept(
     def: StructureDefinition | FunctionDefinition,
     purpose: Purpose,
     affiliation: StructureDefinition | undefined,
-    locales: Locale[],
+    locales: Locales,
     context: Context
 ) {
     return def instanceof StructureDefinition
@@ -369,7 +369,7 @@ export function getStructureOrFunctionConcept(
 }
 
 export function getOutputConcepts(
-    locales: Locale[],
+    locales: Locales,
     context: Context
 ): Concept[] {
     return [
diff --git a/src/concepts/FunctionConcept.ts b/src/concepts/FunctionConcept.ts
index 45a2373b6..4c4911b65 100644
--- a/src/concepts/FunctionConcept.ts
+++ b/src/concepts/FunctionConcept.ts
@@ -4,12 +4,12 @@ import type Node from '@nodes/Node';
 import BindConcept from './BindConcept';
 import Concept from './Concept';
 import type StructureConcept from './StructureConcept';
-import type Locale from '@locale/Locale';
 import type Purpose from './Purpose';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import Emotion from '../lore/Emotion';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class FunctionConcept extends Concept {
     /** The function this concept represents. */
@@ -29,7 +29,7 @@ export default class FunctionConcept extends Concept {
         affiliation: StructureDefinition | undefined,
         definition: FunctionDefinition,
         structure: StructureConcept | undefined,
-        locales: Locale[],
+        locales: Locales,
         context: Context
     ) {
         super(purpose, affiliation, context);
@@ -48,9 +48,9 @@ export default class FunctionConcept extends Concept {
         );
     }
 
-    getGlyphs(locales: Locale[]) {
+    getGlyphs(locales: Locales) {
         return {
-            symbols: this.definition.names.getPreferredNameString(locales),
+            symbols: locales.getName(this.definition.names),
         };
     }
 
@@ -62,13 +62,13 @@ export default class FunctionConcept extends Concept {
         return this.definition.names.hasName(name);
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        const doc = this.definition.docs?.getPreferredLocale(locale);
-        return doc?.markup?.concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        const doc = this.definition.docs?.getPreferredLocale(locales);
+        return doc?.markup?.concretize(locales, []);
     }
 
-    getName(locale: Locale) {
-        return this.definition.names.getPreferredNameString([locale], false);
+    getName(locales: Locales) {
+        return locales.getName(this.definition.names, false);
     }
 
     getRepresentation() {
diff --git a/src/concepts/NodeConcept.ts b/src/concepts/NodeConcept.ts
index 08efe31af..7d4b0dfb3 100644
--- a/src/concepts/NodeConcept.ts
+++ b/src/concepts/NodeConcept.ts
@@ -1,13 +1,13 @@
 import Concept from './Concept';
 import type Node from '@nodes/Node';
 import type Context from '@nodes/Context';
-import type Locale from '@locale/Locale';
 import type Purpose from './Purpose';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import type Emotion from '../lore/Emotion';
 import type Markup from '../nodes/Markup';
 import { docToMarkup } from '@locale/Locale';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class NodeConcept extends Concept {
     readonly template: Node;
@@ -28,29 +28,32 @@ export default class NodeConcept extends Concept {
     }
 
     /** Returns the emotions for the glyphs */
-    getEmotion(translation: Locale) {
-        return this.template.getNodeLocale(translation).emotion as Emotion;
+    getEmotion(locales: Locales) {
+        return this.template.getNodeLocale(locales).emotion as Emotion;
     }
 
     /** Nodes can be matched by two names: the locale-specific one or the key in the locale
      * (e.g., FunctionDefinition, Evaluate).
      */
-    hasName(name: string, locale: Locale): boolean {
-        const nodeLocale = this.template.getNodeLocale(locale);
-        const match = Object.entries(locale.node).find(
+    hasName(name: string, locales: Locales): boolean {
+        const nodeLocale = this.template.getNodeLocale(locales);
+        const match = Object.entries(locales.getLocales()[0].node).find(
             ([, value]) => value === nodeLocale
         );
         return match ? match[0] === name || match[1].name === name : false;
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        return docToMarkup(this.template.getDoc(locale)).concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        return docToMarkup(this.template.getDoc(locales)).concretize(
+            locales,
+            []
+        );
     }
 
-    getName(locale: Locale, symbolic: boolean) {
+    getName(locales: Locales, symbolic: boolean) {
         return symbolic
             ? this.template.getGlyphs().symbols
-            : this.template.getLabel(locale);
+            : this.template.getLabel(locales);
     }
 
     getRepresentation() {
@@ -69,9 +72,11 @@ export default class NodeConcept extends Concept {
         return new Set();
     }
 
-    getCharacter(locale: Locale): Character | undefined {
-        const text = this.template.getNodeLocale(locale);
-        const match = Object.entries(locale.node).find(([, t]) => t === text);
+    getCharacter(locales: Locales): Character | undefined {
+        const text = this.template.getNodeLocale(locales);
+        const match = Object.entries(locales.getLocales()[0].node).find(
+            ([, t]) => t === text
+        );
         return match ? (match[0] as Character) : undefined;
     }
 
diff --git a/src/concepts/StreamConcept.ts b/src/concepts/StreamConcept.ts
index 4c1071224..9e0399139 100644
--- a/src/concepts/StreamConcept.ts
+++ b/src/concepts/StreamConcept.ts
@@ -3,7 +3,6 @@ import type Node from '@nodes/Node';
 import Reference from '@nodes/Reference';
 import Concept from './Concept';
 import type ConceptIndex from './ConceptIndex';
-import type Locale from '@locale/Locale';
 import Purpose from './Purpose';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import Emotion from '../lore/Emotion';
@@ -13,6 +12,7 @@ import Evaluate from '../nodes/Evaluate';
 import ExpressionPlaceholder from '../nodes/ExpressionPlaceholder';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class StreamConcept extends Concept {
     /** The type this concept represents. */
@@ -24,15 +24,12 @@ export default class StreamConcept extends Concept {
     /** Bind concepts */
     readonly inputs: BindConcept[];
 
-    constructor(stream: StreamDefinition, locales: Locale[], context: Context) {
+    constructor(stream: StreamDefinition, locales: Locales, context: Context) {
         super(Purpose.Input, undefined, context);
 
         this.definition = stream;
         this.reference = Evaluate.make(
-            Reference.make(
-                stream.names.getPreferredNameString(locales),
-                this.definition
-            ),
+            Reference.make(locales.getName(stream.names), this.definition),
             this.definition.inputs
                 // .filter((input) => !input.hasDefault())
                 .map((input) => ExpressionPlaceholder.make(input.type))
@@ -43,12 +40,9 @@ export default class StreamConcept extends Concept {
         );
     }
 
-    getGlyphs(locales: Locale[]) {
+    getGlyphs(locales: Locales) {
         return {
-            symbols: this.definition.names.getPreferredNameString(
-                locales,
-                true
-            ),
+            symbols: locales.getName(this.definition.names),
         };
     }
 
@@ -60,13 +54,13 @@ export default class StreamConcept extends Concept {
         return this.definition.names.hasName(name);
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        const doc = this.definition.docs?.getPreferredLocale(locale);
-        return doc?.markup.concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        const doc = this.definition.docs?.getPreferredLocale(locales);
+        return doc?.markup.concretize(locales, []);
     }
 
-    getName(locale: Locale, symbolic: boolean) {
-        return this.definition.names.getPreferredNameString([locale], symbolic);
+    getName(locales: Locales, symbolic: boolean) {
+        return locales.getName(this.definition.names, symbolic);
     }
 
     getTypeConcept(index: ConceptIndex): StructureConcept | undefined {
@@ -90,16 +84,18 @@ export default class StreamConcept extends Concept {
         return new Set(this.inputs);
     }
 
-    getCharacter(locale: Locale): Character | undefined {
-        const name = this.definition.names.getNonSymbolicName();
-        if (name === undefined) return undefined;
-        for (const [key, text] of Object.entries(locale.input))
-            if (
-                'names' in text &&
-                ((typeof text.names === 'string' && text.names === name) ||
-                    text.names.includes(name))
-            )
-                return key as Character;
+    getCharacter(locales: Locales): Character | undefined {
+        for (const locale of locales.getLocales()) {
+            const name = this.definition.names.getNonSymbolicName();
+            if (name === undefined) return undefined;
+            for (const [key, text] of Object.entries(locale.input))
+                if (
+                    'names' in text &&
+                    ((typeof text.names === 'string' && text.names === name) ||
+                        text.names.includes(name))
+                )
+                    return key as Character;
+        }
         return undefined;
     }
 
diff --git a/src/concepts/StructureConcept.ts b/src/concepts/StructureConcept.ts
index c52d12707..bcde164a3 100644
--- a/src/concepts/StructureConcept.ts
+++ b/src/concepts/StructureConcept.ts
@@ -8,11 +8,11 @@ import NameType from '@nodes/NameType';
 import type Context from '@nodes/Context';
 import ConversionConcept from './ConversionConcept';
 import StructureType from '@nodes/StructureType';
-import type Locale from '@locale/Locale';
 import Purpose from './Purpose';
 import Emotion from '../lore/Emotion';
 import type Markup from '../nodes/Markup';
 import type { Character } from '../tutorial/Tutorial';
+import type Locales from '../locale/Locales';
 
 export default class StructureConcept extends Concept {
     /** The type this concept represents. */
@@ -45,7 +45,7 @@ export default class StructureConcept extends Concept {
         definition: StructureDefinition,
         type: Type | undefined,
         examples: Node[] | undefined,
-        locales: Locale[],
+        locales: Locales,
         context: Context
     ) {
         super(purpose, affiliation, context);
@@ -54,7 +54,7 @@ export default class StructureConcept extends Concept {
         this.type =
             type ??
             NameType.make(
-                this.definition.names.getPreferredNameString(locales),
+                locales.getName(this.definition.names),
                 this.definition
             );
         this.examples =
@@ -96,10 +96,7 @@ export default class StructureConcept extends Concept {
                         purpose,
                         this.definition,
                         inter,
-                        NameType.make(
-                            inter.names.getPreferredNameString(locales),
-                            inter
-                        ),
+                        NameType.make(locales.getName(inter.names), inter),
                         [],
                         locales,
                         context
@@ -107,12 +104,9 @@ export default class StructureConcept extends Concept {
             );
     }
 
-    getGlyphs(locales: Locale[]) {
+    getGlyphs(locales: Locales) {
         return {
-            symbols: this.definition.names.getPreferredNameString(
-                locales,
-                true
-            ),
+            symbols: locales.getName(this.definition.names),
         };
     }
 
@@ -124,13 +118,13 @@ export default class StructureConcept extends Concept {
         return this.definition.names.hasName(name);
     }
 
-    getDocs(locale: Locale): Markup | undefined {
-        const doc = this.definition.docs?.getPreferredLocale(locale);
-        return doc?.markup.concretize(locale, []);
+    getDocs(locales: Locales): Markup | undefined {
+        const doc = this.definition.docs?.getPreferredLocale(locales);
+        return doc?.markup.concretize(locales, []);
     }
 
-    getName(locale: Locale, symbolic: boolean) {
-        return this.definition.names.getPreferredNameString([locale], symbolic);
+    getName(locales: Locales, symbolic: boolean) {
+        return locales.getName(this.definition.names, symbolic);
     }
 
     getRepresentation() {
@@ -161,23 +155,25 @@ export default class StructureConcept extends Concept {
         );
     }
 
-    getCharacter(locale: Locale): Character | undefined {
-        const name = this.definition.names.getNonSymbolicName();
-        if (name === undefined) return undefined;
-        for (const [key, text] of Object.entries(locale.output))
-            if (
-                'names' in text &&
-                ((typeof text.names === 'string' && text.names === name) ||
-                    text.names.includes(name))
-            )
-                return key as Character;
-        for (const [key, text] of Object.entries(locale.basis))
-            if (
-                'name' in text &&
-                ((typeof text.name === 'string' && text.name === name) ||
-                    text.name.includes(name))
-            )
-                return key as Character;
+    getCharacter(locales: Locales): Character | undefined {
+        for (const locale of locales.getLocales()) {
+            const name = this.definition.names.getNonSymbolicName();
+            if (name === undefined) return undefined;
+            for (const [key, text] of Object.entries(locale.output))
+                if (
+                    'names' in text &&
+                    ((typeof text.names === 'string' && text.names === name) ||
+                        text.names.includes(name))
+                )
+                    return key as Character;
+            for (const [key, text] of Object.entries(locale.basis))
+                if (
+                    'name' in text &&
+                    ((typeof text.name === 'string' && text.name === name) ||
+                        text.name.includes(name))
+                )
+                    return key as Character;
+        }
         return undefined;
     }
 
diff --git a/src/conflicts/BorrowCycle.ts b/src/conflicts/BorrowCycle.ts
index 9866f4801..f9aa22209 100644
--- a/src/conflicts/BorrowCycle.ts
+++ b/src/conflicts/BorrowCycle.ts
@@ -2,10 +2,10 @@ import type Source from '@nodes/Source';
 import type Borrow from '@nodes/Borrow';
 import type Program from '@nodes/Program';
 import Conflict from './Conflict';
-import type Locale from '@locale/Locale';
 import type Context from '@nodes/Context';
 import NodeRef from '@locale/NodeRef';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class BorrowCycle extends Conflict {
     readonly program: Program;
@@ -23,15 +23,15 @@ export class BorrowCycle extends Conflict {
         return {
             primary: {
                 node: this.borrow,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Borrow.conflict.BorrowCycle,
+                        locales,
+                        locales.get((l) => l.node.Borrow.conflict.BorrowCycle),
                         new NodeRef(
                             this.borrow,
-                            locale,
+                            locales,
                             context,
-                            this.cycle[0].names.getPreferredNameString([locale])
+                            locales.getName(this.cycle[0].names)
                         )
                     ),
             },
diff --git a/src/conflicts/Conflict.ts b/src/conflicts/Conflict.ts
index 94a38b51b..7a26e09da 100644
--- a/src/conflicts/Conflict.ts
+++ b/src/conflicts/Conflict.ts
@@ -1,11 +1,11 @@
 import type Node from '@nodes/Node';
 import type Context from '@nodes/Context';
-import type Locale from '@locale/Locale';
 import type Markup from '../nodes/Markup';
+import type Locales from '../locale/Locales';
 
 type ConflictingNode = {
     node: Node;
-    explanation: (translation: Locale, context: Context) => Markup;
+    explanation: (locales: Locales, context: Context) => Markup;
 };
 
 export default abstract class Conflict {
diff --git a/src/conflicts/DisallowedInputs.ts b/src/conflicts/DisallowedInputs.ts
index f8c0b7096..21579c2e9 100644
--- a/src/conflicts/DisallowedInputs.ts
+++ b/src/conflicts/DisallowedInputs.ts
@@ -1,7 +1,7 @@
 import type StructureDefinition from '@nodes/StructureDefinition';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class DisallowedInputs extends Conflict {
     readonly structure: StructureDefinition;
@@ -15,11 +15,14 @@ export class DisallowedInputs extends Conflict {
         return {
             primary: {
                 node: this.structure,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.StructureDefinition.conflict
-                            .DisallowedInputs
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.StructureDefinition.conflict
+                                    .DisallowedInputs
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/DuplicateName.ts b/src/conflicts/DuplicateName.ts
index e75d42a0e..b44128dcf 100644
--- a/src/conflicts/DuplicateName.ts
+++ b/src/conflicts/DuplicateName.ts
@@ -1,10 +1,10 @@
 import Conflict from './Conflict';
 import type Name from '@nodes/Name';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import concretize from '../locale/concretize';
 import type Bind from '../nodes/Bind';
+import type Locales from '../locale/Locales';
 
 export default class DuplicateName extends Conflict {
     readonly bind: Bind;
@@ -21,13 +21,15 @@ export default class DuplicateName extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.DuplicateName.primary,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.DuplicateName.primary
+                        ),
                         new NodeRef(
                             this.duplicate,
-                            locale,
+                            locales,
                             context,
                             this.duplicate.getName()
                         )
@@ -35,13 +37,15 @@ export default class DuplicateName extends Conflict {
             },
             secondary: {
                 node: this.duplicate,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.DuplicateName.secondary,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.DuplicateName.secondary
+                        ),
                         new NodeRef(
                             this.bind,
-                            locale,
+                            locales,
                             context,
                             this.duplicate.getName()
                         )
diff --git a/src/conflicts/DuplicateShare.ts b/src/conflicts/DuplicateShare.ts
index 20ee19391..cfbcd307a 100644
--- a/src/conflicts/DuplicateShare.ts
+++ b/src/conflicts/DuplicateShare.ts
@@ -1,9 +1,9 @@
 import type Bind from '@nodes/Bind';
 import type Context from '@nodes/Context';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class DuplicateShare extends Conflict {
     readonly share: Bind;
@@ -18,20 +18,24 @@ export class DuplicateShare extends Conflict {
         return {
             primary: {
                 node: this.share.names,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.DuplicateShare.primary,
-                        new NodeRef(this.other, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.DuplicateShare.primary
+                        ),
+                        new NodeRef(this.other, locales, context)
                     ),
             },
             secondary: {
                 node: this.other.names,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.DuplicateShare.secondary,
-                        new NodeRef(this.other, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.DuplicateShare.secondary
+                        ),
+                        new NodeRef(this.other, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/DuplicateTypeVariable.ts b/src/conflicts/DuplicateTypeVariable.ts
index 5c0a06d87..135747ca8 100644
--- a/src/conflicts/DuplicateTypeVariable.ts
+++ b/src/conflicts/DuplicateTypeVariable.ts
@@ -1,9 +1,9 @@
 import Conflict from './Conflict';
 import type TypeVariable from '@nodes/TypeVariable';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class DuplicateTypeVariable extends Conflict {
     readonly typeVar: TypeVariable;
@@ -20,31 +20,37 @@ export default class DuplicateTypeVariable extends Conflict {
         return {
             primary: {
                 node: this.typeVar,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.TypeVariable.conflict.DuplicateTypeVariable
-                            .primary,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.TypeVariable.conflict
+                                    .DuplicateTypeVariable
+                        ).primary,
                         new NodeRef(
                             this.duplicate,
-                            locale,
+                            locales,
                             context,
-                            this.duplicate.getPreferredName(locale)
+                            locales.getName(this.duplicate.names)
                         )
                     ),
             },
             secondary: {
                 node: this.duplicate,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.TypeVariable.conflict.DuplicateTypeVariable
-                            .secondary,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.TypeVariable.conflict
+                                    .DuplicateTypeVariable
+                        ).secondary,
                         new NodeRef(
                             this.typeVar,
-                            locale,
+                            locales,
                             context,
-                            this.typeVar.getPreferredName(locale)
+                            locales.getName(this.typeVar.names)
                         )
                     ),
             },
diff --git a/src/conflicts/ExpectedBooleanCondition.ts b/src/conflicts/ExpectedBooleanCondition.ts
index e0f06e83b..2bca8b038 100644
--- a/src/conflicts/ExpectedBooleanCondition.ts
+++ b/src/conflicts/ExpectedBooleanCondition.ts
@@ -2,10 +2,10 @@ import Conditional from '@nodes/Conditional';
 import type Context from '@nodes/Context';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import type Reaction from '../nodes/Reaction';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class ExpectedBooleanCondition extends Conflict {
     readonly conditional: Conditional | Reaction;
@@ -25,22 +25,28 @@ export default class ExpectedBooleanCondition extends Conflict {
                     this.conditional instanceof Conditional
                         ? this.conditional.question
                         : this.conditional.dots,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Conditional.conflict
-                            .ExpectedBooleanCondition.primary,
-                        new NodeRef(this.type, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Conditional.conflict
+                                    .ExpectedBooleanCondition.primary
+                        ),
+                        new NodeRef(this.type, locales, context)
                     ),
             },
             secondary: {
                 node: this.conditional.condition,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Conditional.conflict
-                            .ExpectedBooleanCondition.secondary,
-                        new NodeRef(this.type, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Conditional.conflict
+                                    .ExpectedBooleanCondition.secondary
+                        ),
+                        new NodeRef(this.type, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/ExpectedColumnBind.ts b/src/conflicts/ExpectedColumnBind.ts
index f428d3c42..f23960403 100644
--- a/src/conflicts/ExpectedColumnBind.ts
+++ b/src/conflicts/ExpectedColumnBind.ts
@@ -1,10 +1,10 @@
 import type Context from '@nodes/Context';
 import type Expression from '@nodes/Expression';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type Update from '../nodes/Update';
+import type Locales from '../locale/Locales';
 
 export default class ExpectedColumnBind extends Conflict {
     readonly update: Update;
@@ -20,11 +20,13 @@ export default class ExpectedColumnBind extends Conflict {
         return {
             primary: {
                 node: this.update,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Update.conflict.ExpectedColumnBind,
-                        new NodeRef(this.cell, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Update.conflict.ExpectedColumnBind
+                        ),
+                        new NodeRef(this.cell, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/ExpectedColumnType.ts b/src/conflicts/ExpectedColumnType.ts
index ea98ac78b..90ea0975b 100644
--- a/src/conflicts/ExpectedColumnType.ts
+++ b/src/conflicts/ExpectedColumnType.ts
@@ -1,10 +1,10 @@
 import type Bind from '@nodes/Bind';
 import type Context from '@nodes/Context';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type TableType from '../nodes/TableType';
+import type Locales from '../locale/Locales';
 
 export default class ExpectedColumnType extends Conflict {
     readonly table: TableType;
@@ -20,11 +20,13 @@ export default class ExpectedColumnType extends Conflict {
         return {
             primary: {
                 node: this.table,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.TableType.conflict.ExpectedColumnType,
-                        new NodeRef(this.column, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.TableType.conflict.ExpectedColumnType
+                        ),
+                        new NodeRef(this.column, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/ExpectedEndingExpression.ts b/src/conflicts/ExpectedEndingExpression.ts
index 02ea53036..296fa6ecf 100644
--- a/src/conflicts/ExpectedEndingExpression.ts
+++ b/src/conflicts/ExpectedEndingExpression.ts
@@ -1,7 +1,7 @@
 import type Block from '@nodes/Block';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class ExpectedEndingExpression extends Conflict {
     readonly block: Block;
@@ -15,10 +15,13 @@ export class ExpectedEndingExpression extends Conflict {
         return {
             primary: {
                 node: this.block,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Block.conflict.ExpectedEndingExpression
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Block.conflict.ExpectedEndingExpression
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/ExpectedSelectName.ts b/src/conflicts/ExpectedSelectName.ts
index c28963bf8..32eaa68c2 100644
--- a/src/conflicts/ExpectedSelectName.ts
+++ b/src/conflicts/ExpectedSelectName.ts
@@ -1,10 +1,10 @@
 import type Context from '@nodes/Context';
 import type Expression from '@nodes/Expression';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type Select from '../nodes/Select';
+import type Locales from '../locale/Locales';
 
 export default class ExpectedSelectName extends Conflict {
     readonly select: Select;
@@ -21,11 +21,13 @@ export default class ExpectedSelectName extends Conflict {
         return {
             primary: {
                 node: this.select,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Select.conflict.ExpectedSelectName,
-                        new NodeRef(this.cell, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Select.conflict.ExpectedSelectName
+                        ),
+                        new NodeRef(this.cell, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/ExpectedStream.ts b/src/conflicts/ExpectedStream.ts
index a7ffa2a4c..a7749b9f7 100644
--- a/src/conflicts/ExpectedStream.ts
+++ b/src/conflicts/ExpectedStream.ts
@@ -1,9 +1,9 @@
 import Conflict from './Conflict';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import concretize from '../locale/concretize';
 import type Reaction from '../nodes/Reaction';
+import type Locales from '../locale/Locales';
 
 export default class ExpectedStream extends Conflict {
     readonly reaction: Reaction;
@@ -18,11 +18,13 @@ export default class ExpectedStream extends Conflict {
         return {
             primary: {
                 node: this.reaction.condition,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Reaction.conflict.ExpectedStream,
-                        new NodeRef(this.reaction.condition, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Reaction.conflict.ExpectedStream
+                        ),
+                        new NodeRef(this.reaction.condition, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/ExtraCell.ts b/src/conflicts/ExtraCell.ts
index 9314c392c..683a4eaf0 100644
--- a/src/conflicts/ExtraCell.ts
+++ b/src/conflicts/ExtraCell.ts
@@ -1,10 +1,10 @@
 import type Context from '@nodes/Context';
 import type TableType from '@nodes/TableType';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class MissingCell extends Conflict {
     readonly cell: Expression;
@@ -21,19 +21,23 @@ export default class MissingCell extends Conflict {
         return {
             primary: {
                 node: this.cell,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.ExtraCell.primary
+                        locales,
+                        locales.get(
+                            (l) => l.node.Row.conflict.ExtraCell.primary
+                        )
                     ),
             },
             secondary: {
                 node: this.type,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.ExtraCell.secondary,
-                        new NodeRef(this.cell, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Row.conflict.ExtraCell.secondary
+                        ),
+                        new NodeRef(this.cell, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/IgnoredExpression.ts b/src/conflicts/IgnoredExpression.ts
index 8cdfb1436..e5db5544e 100644
--- a/src/conflicts/IgnoredExpression.ts
+++ b/src/conflicts/IgnoredExpression.ts
@@ -1,8 +1,8 @@
 import type Expression from '@nodes/Expression';
 import Conflict from './Conflict';
-import type Locale from '@locale/Locale';
 import type Block from '../nodes/Block';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class IgnoredExpression extends Conflict {
     readonly block: Block;
@@ -18,18 +18,25 @@ export class IgnoredExpression extends Conflict {
         return {
             primary: {
                 node: this.block,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Block.conflict.IgnoredExpression.primary
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Block.conflict.IgnoredExpression.primary
+                        )
                     ),
             },
             secondary: {
                 node: this.expr,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Block.conflict.IgnoredExpression.secondary
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Block.conflict.IgnoredExpression
+                                    .secondary
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/ImpossibleType.ts b/src/conflicts/ImpossibleType.ts
index c5397ee03..100ada084 100644
--- a/src/conflicts/ImpossibleType.ts
+++ b/src/conflicts/ImpossibleType.ts
@@ -1,8 +1,8 @@
 import Conflict from './Conflict';
 import type Type from '@nodes/Type';
 import type Is from '@nodes/Is';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class ImpossibleType extends Conflict {
     readonly is: Is;
@@ -18,8 +18,11 @@ export class ImpossibleType extends Conflict {
         return {
             primary: {
                 node: this.is,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.Is.conflict.ImpossibleType),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.Is.conflict.ImpossibleType)
+                    ),
             },
         };
     }
diff --git a/src/conflicts/IncompatibleCellType.ts b/src/conflicts/IncompatibleCellType.ts
index b0cd9efa7..de729bd87 100644
--- a/src/conflicts/IncompatibleCellType.ts
+++ b/src/conflicts/IncompatibleCellType.ts
@@ -3,9 +3,9 @@ import type Expression from '@nodes/Expression';
 import type TableType from '@nodes/TableType';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class IncompatibleCellType extends Conflict {
     readonly type: TableType;
@@ -31,22 +31,28 @@ export default class IncompatibleCellType extends Conflict {
         return {
             primary: {
                 node: this.cell,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Update.conflict.IncompatibleCellType
-                            .primary,
-                        new NodeRef(this.expected, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Update.conflict.IncompatibleCellType
+                                    .primary
+                        ),
+                        new NodeRef(this.expected, locales, context)
                     ),
             },
             secondary: {
                 node: this.type,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Update.conflict.IncompatibleCellType
-                            .secondary,
-                        new NodeRef(this.received, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Update.conflict.IncompatibleCellType
+                                    .secondary
+                        ),
+                        new NodeRef(this.received, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/IncompatibleInput.ts b/src/conflicts/IncompatibleInput.ts
index 802d7b7d1..4c0bcf20a 100644
--- a/src/conflicts/IncompatibleInput.ts
+++ b/src/conflicts/IncompatibleInput.ts
@@ -1,10 +1,10 @@
 import Conflict from './Conflict';
 import type Type from '@nodes/Type';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import type Node from '../nodes/Node';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class IncompatibleInput extends Conflict {
     readonly givenNode: Node;
@@ -22,37 +22,44 @@ export default class IncompatibleInput extends Conflict {
         return {
             primary: {
                 node: this.givenNode,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.IncompatibleInput.primary,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.IncompatibleInput
+                                    .primary
+                        ),
                         new NodeRef(
                             this.expectedType.simplify(context),
-                            locale,
+                            locales,
                             context
                         ),
                         new NodeRef(
                             this.givenType.simplify(context),
-                            locale,
+                            locales,
                             context
                         )
                     ),
             },
             secondary: {
                 node: this.expectedType,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.IncompatibleInput
-                            .secondary,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.IncompatibleInput
+                                    .secondary
+                        ),
                         new NodeRef(
                             this.expectedType.simplify(context),
-                            locale,
+                            locales,
                             context
                         ),
                         new NodeRef(
                             this.givenType.simplify(context),
-                            locale,
+                            locales,
                             context
                         )
                     ),
diff --git a/src/conflicts/IncompatibleKey.ts b/src/conflicts/IncompatibleKey.ts
index e0a60c071..311aa7ccc 100644
--- a/src/conflicts/IncompatibleKey.ts
+++ b/src/conflicts/IncompatibleKey.ts
@@ -2,9 +2,9 @@ import type Context from '@nodes/Context';
 import type SetOrMapAccess from '@nodes/SetOrMapAccess';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class IncompatibleKey extends Conflict {
     readonly access: SetOrMapAccess;
@@ -22,23 +22,29 @@ export class IncompatibleKey extends Conflict {
         return {
             primary: {
                 node: this.access,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.SetOrMapAccess.conflict.IncompatibleKey
-                            .primary,
-                        new NodeRef(this.expected, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.SetOrMapAccess.conflict.IncompatibleKey
+                                    .primary
+                        ),
+                        new NodeRef(this.expected, locales, context)
                     ),
             },
             secondary: {
                 node: this.access.setOrMap,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.SetOrMapAccess.conflict.IncompatibleKey
-                            .secondary,
-                        new NodeRef(this.received, locale, context),
-                        new NodeRef(this.expected, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.SetOrMapAccess.conflict.IncompatibleKey
+                                    .secondary
+                        ),
+                        new NodeRef(this.received, locales, context),
+                        new NodeRef(this.expected, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/IncompatibleType.ts b/src/conflicts/IncompatibleType.ts
index 12ed9000f..fc2af0630 100644
--- a/src/conflicts/IncompatibleType.ts
+++ b/src/conflicts/IncompatibleType.ts
@@ -2,10 +2,10 @@ import type Context from '@nodes/Context';
 import type Expression from '@nodes/Expression';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type Node from '../nodes/Node';
+import type Locales from '../locale/Locales';
 
 export default class IncompatibleType extends Conflict {
     readonly receiver: Node;
@@ -31,22 +31,27 @@ export default class IncompatibleType extends Conflict {
         return {
             primary: {
                 node: this.receiver,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.IncompatibleType.primary,
-                        new NodeRef(this.givenType, locale, context),
-                        new NodeRef(this.expectedType, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.IncompatibleType.primary
+                        ),
+                        new NodeRef(this.givenType, locales, context),
+                        new NodeRef(this.expectedType, locales, context)
                     ),
             },
             secondary: {
                 node: this.expression,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.IncompatibleType.secondary,
-                        new NodeRef(this.givenType, locale, context),
-                        new NodeRef(this.expectedType, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Bind.conflict.IncompatibleType.secondary
+                        ),
+                        new NodeRef(this.givenType, locales, context),
+                        new NodeRef(this.expectedType, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/IncompleteImplementation.ts b/src/conflicts/IncompleteImplementation.ts
index f1d8e44bd..7ee66301d 100644
--- a/src/conflicts/IncompleteImplementation.ts
+++ b/src/conflicts/IncompleteImplementation.ts
@@ -1,7 +1,7 @@
 import type StructureDefinition from '@nodes/StructureDefinition';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class IncompleteImplementation extends Conflict {
     readonly structure: StructureDefinition;
@@ -15,11 +15,14 @@ export class IncompleteImplementation extends Conflict {
         return {
             primary: {
                 node: this.structure,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.StructureDefinition.conflict
-                            .IncompleteImplementation
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.StructureDefinition.conflict
+                                    .IncompleteImplementation
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/InputListMustBeLast.ts b/src/conflicts/InputListMustBeLast.ts
index cc29513d4..ec9e6f7bc 100644
--- a/src/conflicts/InputListMustBeLast.ts
+++ b/src/conflicts/InputListMustBeLast.ts
@@ -1,7 +1,7 @@
 import Conflict from './Conflict';
 import type Bind from '@nodes/Bind';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class InputListMustBeLast extends Conflict {
     readonly bind: Bind;
@@ -16,10 +16,12 @@ export default class InputListMustBeLast extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.InputListMustBeLast
+                        locales,
+                        locales.get(
+                            (l) => l.node.Evaluate.conflict.InputListMustBeLast
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/InvalidRow.ts b/src/conflicts/InvalidRow.ts
index bdcd5bbb7..002222032 100644
--- a/src/conflicts/InvalidRow.ts
+++ b/src/conflicts/InvalidRow.ts
@@ -1,7 +1,7 @@
 import type Row from '@nodes/Row';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class InvalidRow extends Conflict {
     readonly row: Row;
@@ -15,8 +15,11 @@ export default class InvalidRow extends Conflict {
         return {
             primary: {
                 node: this.row,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.Row.conflict.InvalidRow),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.Row.conflict.InvalidRow)
+                    ),
             },
         };
     }
diff --git a/src/conflicts/MisplacedConversion.ts b/src/conflicts/MisplacedConversion.ts
index d23abe7ac..586b0b3e9 100644
--- a/src/conflicts/MisplacedConversion.ts
+++ b/src/conflicts/MisplacedConversion.ts
@@ -1,7 +1,7 @@
 import type ConversionDefinition from '@nodes/ConversionDefinition';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class MisplacedConversion extends Conflict {
     readonly conversion: ConversionDefinition;
@@ -16,11 +16,14 @@ export class MisplacedConversion extends Conflict {
         return {
             primary: {
                 node: this.conversion,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.ConversionDefinition.conflict
-                            .MisplacedConversion
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.ConversionDefinition.conflict
+                                    .MisplacedConversion
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/MisplacedInput.ts b/src/conflicts/MisplacedInput.ts
index b26f73278..c1080156a 100644
--- a/src/conflicts/MisplacedInput.ts
+++ b/src/conflicts/MisplacedInput.ts
@@ -3,9 +3,9 @@ import Conflict from './Conflict';
 import type Bind from '@nodes/Bind';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
 import type StructureDefinition from '@nodes/StructureDefinition';
-import type Locale from '@locale/Locale';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class MisplacedInput extends Conflict {
     readonly func: FunctionDefinition | StructureDefinition | StreamDefinition;
@@ -31,10 +31,12 @@ export default class MisplacedInput extends Conflict {
         return {
             primary: {
                 node: this.evaluate,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.MisplacedInput
+                        locales,
+                        locales.get(
+                            (l) => l.node.Evaluate.conflict.MisplacedInput
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/MisplacedShare.ts b/src/conflicts/MisplacedShare.ts
index d13678911..f3f5c906a 100644
--- a/src/conflicts/MisplacedShare.ts
+++ b/src/conflicts/MisplacedShare.ts
@@ -1,8 +1,8 @@
 import type Bind from '@nodes/Bind';
 import type Token from '@nodes/Token';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class MisplacedShare extends Conflict {
     readonly bind: Bind;
@@ -18,10 +18,10 @@ export class MisplacedShare extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.Bind.conflict.MisplacedShare
+                        locales,
+                        locales.get((l) => l.node.Bind.conflict.MisplacedShare)
                     ),
             },
         };
diff --git a/src/conflicts/MisplacedThis.ts b/src/conflicts/MisplacedThis.ts
index 693d936c6..a07c1e659 100644
--- a/src/conflicts/MisplacedThis.ts
+++ b/src/conflicts/MisplacedThis.ts
@@ -1,7 +1,7 @@
 import type This from '@nodes/This';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class MisplacedThis extends Conflict {
     readonly dis: This;
@@ -14,8 +14,11 @@ export class MisplacedThis extends Conflict {
         return {
             primary: {
                 node: this.dis,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.This.conflict.MisplacedThis),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.This.conflict.MisplacedThis)
+                    ),
             },
         };
     }
diff --git a/src/conflicts/MissingCell.ts b/src/conflicts/MissingCell.ts
index c8e9086ac..4072a9608 100644
--- a/src/conflicts/MissingCell.ts
+++ b/src/conflicts/MissingCell.ts
@@ -3,9 +3,9 @@ import type Context from '@nodes/Context';
 import type Row from '@nodes/Row';
 import type TableType from '@nodes/TableType';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class MissingCell extends Conflict {
     readonly row: Row;
@@ -24,25 +24,29 @@ export default class MissingCell extends Conflict {
         return {
             primary: {
                 node: this.row,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.MissingCell.primary,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Row.conflict.MissingCell.primary
+                        ),
                         new NodeRef(
                             this.column,
-                            locale,
+                            locales,
                             context,
-                            this.column.names.getPreferredNameString([locale])
+                            locales.getName(this.column.names)
                         )
                     ),
             },
             secondary: {
                 node: this.column,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.MissingCell.secondary,
-                        new NodeRef(this.row, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Row.conflict.MissingCell.secondary
+                        ),
+                        new NodeRef(this.row, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/MissingInput.ts b/src/conflicts/MissingInput.ts
index 57976ff70..bd62f9b10 100644
--- a/src/conflicts/MissingInput.ts
+++ b/src/conflicts/MissingInput.ts
@@ -4,13 +4,13 @@ import type Bind from '@nodes/Bind';
 import type BinaryEvaluate from '@nodes/BinaryEvaluate';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
 import type StructureDefinition from '@nodes/StructureDefinition';
-import type Locale from '@locale/Locale';
 import type Expression from '@nodes/Expression';
 import type Token from '@nodes/Token';
 import type Context from '@nodes/Context';
 import NodeRef from '@locale/NodeRef';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class MissingInput extends Conflict {
     readonly func: FunctionDefinition | StructureDefinition | StreamDefinition;
@@ -35,25 +35,30 @@ export default class MissingInput extends Conflict {
         return {
             primary: {
                 node: this.evaluate,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.MissingInput.primary,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Evaluate.conflict.MissingInput.primary
+                        ),
                         new NodeRef(
                             this.input,
-                            locale,
+                            locales,
                             context,
-                            this.input.names.getPreferredNameString([locale])
+                            locales.getName(this.input.names)
                         )
                     ),
             },
             secondary: {
                 node: this.input.names,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.MissingInput.secondary,
-                        new NodeRef(this.evaluate, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.MissingInput.secondary
+                        ),
+                        new NodeRef(this.evaluate, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/MissingLanguage.ts b/src/conflicts/MissingLanguage.ts
index 1bd65fbd2..898195fce 100644
--- a/src/conflicts/MissingLanguage.ts
+++ b/src/conflicts/MissingLanguage.ts
@@ -1,8 +1,8 @@
 import type Language from '@nodes/Language';
 import type Token from '@nodes/Token';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class MissingLanguage extends Conflict {
     readonly language: Language;
@@ -18,10 +18,12 @@ export default class MissingLanguage extends Conflict {
         return {
             primary: {
                 node: this.language,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Language.conflict.MissingLanguage
+                        locales,
+                        locales.get(
+                            (l) => l.node.Language.conflict.MissingLanguage
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/MissingShareLanguages.ts b/src/conflicts/MissingShareLanguages.ts
index 2be780a4d..d6cb628cf 100644
--- a/src/conflicts/MissingShareLanguages.ts
+++ b/src/conflicts/MissingShareLanguages.ts
@@ -1,7 +1,7 @@
 import type Bind from '@nodes/Bind';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class MissingShareLanguages extends Conflict {
     readonly share: Bind;
@@ -15,10 +15,12 @@ export class MissingShareLanguages extends Conflict {
         return {
             primary: {
                 node: this.share,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.MissingShareLanguages
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.MissingShareLanguages
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/NoExpression.ts b/src/conflicts/NoExpression.ts
index ecfefe8ef..73efe3642 100644
--- a/src/conflicts/NoExpression.ts
+++ b/src/conflicts/NoExpression.ts
@@ -1,7 +1,7 @@
 import Conflict from './Conflict';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class NoExpression extends Conflict {
     readonly def: FunctionDefinition;
@@ -16,11 +16,13 @@ export default class NoExpression extends Conflict {
         return {
             primary: {
                 node: this.def.names,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.FunctionDefinition.conflict
-                            .NoExpression
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.FunctionDefinition.conflict.NoExpression
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/NotAKeyValue.ts b/src/conflicts/NotAKeyValue.ts
index 685c726af..65a97993b 100644
--- a/src/conflicts/NotAKeyValue.ts
+++ b/src/conflicts/NotAKeyValue.ts
@@ -2,9 +2,9 @@ import type Context from '@nodes/Context';
 import type Expression from '@nodes/Expression';
 import type MapLiteral from '@nodes/MapLiteral';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class NotAKeyValue extends Conflict {
     readonly map: MapLiteral;
@@ -20,19 +20,26 @@ export class NotAKeyValue extends Conflict {
         return {
             primary: {
                 node: this.map,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.MapLiteral.conflict.NotAKeyValue.primary
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.MapLiteral.conflict.NotAKeyValue.primary
+                        )
                     ),
             },
             secondary: {
                 node: this.expression,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.MapLiteral.conflict.NotAKeyValue.secondary,
-                        new NodeRef(this.expression, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.MapLiteral.conflict.NotAKeyValue
+                                    .secondary
+                        ),
+                        new NodeRef(this.expression, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/NotANumber.ts b/src/conflicts/NotANumber.ts
index 8ec25f47c..5b8d583f9 100644
--- a/src/conflicts/NotANumber.ts
+++ b/src/conflicts/NotANumber.ts
@@ -1,7 +1,7 @@
 import type NumberLiteral from '@nodes/NumberLiteral';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class NotANumber extends Conflict {
     readonly measurement: NumberLiteral;
@@ -15,10 +15,12 @@ export class NotANumber extends Conflict {
         return {
             primary: {
                 node: this.measurement,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.NumberLiteral.conflict.NotANumber
+                        locales,
+                        locales.get(
+                            (l) => l.node.NumberLiteral.conflict.NotANumber
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/NotAnInterface.ts b/src/conflicts/NotAnInterface.ts
index 6eb8c5f27..1ad3f5c69 100644
--- a/src/conflicts/NotAnInterface.ts
+++ b/src/conflicts/NotAnInterface.ts
@@ -1,8 +1,8 @@
 import Conflict from './Conflict';
 import type Reference from '@nodes/Reference';
 import type Definition from '@nodes/Definition';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class NotAnInterface extends Conflict {
     readonly def: Definition;
@@ -18,10 +18,14 @@ export default class NotAnInterface extends Conflict {
         return {
             primary: {
                 node: this.ref,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.StructureDefinition.conflict.NotAnInterface
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.StructureDefinition.conflict
+                                    .NotAnInterface
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/NotInstantiable.ts b/src/conflicts/NotInstantiable.ts
index 991706ff0..8bef0e6d2 100644
--- a/src/conflicts/NotInstantiable.ts
+++ b/src/conflicts/NotInstantiable.ts
@@ -1,9 +1,9 @@
 import type Evaluate from '@nodes/Evaluate';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
 import type StructureDefinition from '@nodes/StructureDefinition';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class NotInstantiable extends Conflict {
     readonly evaluate: Evaluate;
@@ -26,10 +26,12 @@ export default class NotInstantiable extends Conflict {
         return {
             primary: {
                 node: this.evaluate,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.NotInstantiable
+                        locales,
+                        locales.get(
+                            (l) => l.node.Evaluate.conflict.NotInstantiable
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/OrderOfOperations.ts b/src/conflicts/OrderOfOperations.ts
index feafaf3f3..cb19a9243 100644
--- a/src/conflicts/OrderOfOperations.ts
+++ b/src/conflicts/OrderOfOperations.ts
@@ -1,7 +1,7 @@
 import type BinaryEvaluate from '@nodes/BinaryEvaluate';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class OrderOfOperations extends Conflict {
     readonly operation: BinaryEvaluate;
@@ -18,10 +18,13 @@ export default class OrderOfOperations extends Conflict {
         return {
             primary: {
                 node: this.operation,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.BinaryEvaluate.conflict.OrderOfOperations
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.BinaryEvaluate.conflict.OrderOfOperations
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/Placeholder.ts b/src/conflicts/Placeholder.ts
index 85ba156f7..449b995b2 100644
--- a/src/conflicts/Placeholder.ts
+++ b/src/conflicts/Placeholder.ts
@@ -1,8 +1,8 @@
 import type ExpressionPlaceholder from '@nodes/ExpressionPlaceholder';
 import type TypePlaceholder from '@nodes/TypePlaceholder';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Placeholder extends Conflict {
     readonly placeholder: ExpressionPlaceholder | TypePlaceholder;
@@ -16,11 +16,14 @@ export default class Placeholder extends Conflict {
         return {
             primary: {
                 node: this.placeholder,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.ExpressionPlaceholder.conflict
-                            .Placeholder
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.ExpressionPlaceholder.conflict
+                                    .Placeholder
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/ReferenceCycle.ts b/src/conflicts/ReferenceCycle.ts
index f0502a234..4603e45d5 100644
--- a/src/conflicts/ReferenceCycle.ts
+++ b/src/conflicts/ReferenceCycle.ts
@@ -1,9 +1,9 @@
 import type Context from '@nodes/Context';
 import type Reference from '@nodes/Reference';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class ReferenceCycle extends Conflict {
     readonly name: Reference;
@@ -18,13 +18,15 @@ export default class ReferenceCycle extends Conflict {
         return {
             primary: {
                 node: this.name,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Reference.conflict.ReferenceCycle,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Reference.conflict.ReferenceCycle
+                        ),
                         new NodeRef(
                             this.name,
-                            locale,
+                            locales,
                             context,
                             this.name.getName()
                         )
diff --git a/src/conflicts/RequiredAfterOptional.ts b/src/conflicts/RequiredAfterOptional.ts
index 8f21dd0ba..43ac5c29f 100644
--- a/src/conflicts/RequiredAfterOptional.ts
+++ b/src/conflicts/RequiredAfterOptional.ts
@@ -1,7 +1,7 @@
 import Conflict from './Conflict';
 import type Bind from '@nodes/Bind';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class RequiredAfterOptional extends Conflict {
     readonly bind: Bind;
@@ -16,10 +16,12 @@ export default class RequiredAfterOptional extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Bind.conflict.RequiredAfterOptional
+                        locales,
+                        locales.get(
+                            (l) => l.node.Bind.conflict.RequiredAfterOptional
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/UnclosedDelimiter.ts b/src/conflicts/UnclosedDelimiter.ts
index ab34c943c..4cb69a29e 100644
--- a/src/conflicts/UnclosedDelimiter.ts
+++ b/src/conflicts/UnclosedDelimiter.ts
@@ -1,10 +1,10 @@
 import Conflict from './Conflict';
 import type Node from '@nodes/Node';
 import type Token from '@nodes/Token';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnclosedDelimiter extends Conflict {
     readonly open: Token;
@@ -23,20 +23,23 @@ export default class UnclosedDelimiter extends Conflict {
         return {
             primary: {
                 node: this.open,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.UnparsableExpression.conflict
-                            .UnclosedDelimiter,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.UnparsableExpression.conflict
+                                    .UnclosedDelimiter
+                        ),
                         new NodeRef(
                             this.open,
-                            locale,
+                            locales,
                             context,
                             this.open.getText()
                         ),
                         new NodeRef(
                             this.expected,
-                            locale,
+                            locales,
                             context,
                             this.expected.getText()
                         )
diff --git a/src/conflicts/UnexpectedColumnBind.ts b/src/conflicts/UnexpectedColumnBind.ts
index 441b53e03..24bdf735c 100644
--- a/src/conflicts/UnexpectedColumnBind.ts
+++ b/src/conflicts/UnexpectedColumnBind.ts
@@ -1,10 +1,10 @@
 import type Context from '@nodes/Context';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type Bind from '../nodes/Bind';
 import type TableLiteral from '../nodes/TableLiteral';
+import type Locales from '../locale/Locales';
 
 export default class UnexpectedColumnBind extends Conflict {
     readonly expression: TableLiteral;
@@ -20,20 +20,27 @@ export default class UnexpectedColumnBind extends Conflict {
         return {
             primary: {
                 node: this.expression,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.UnexpectedColumnBind.primary,
-                        new NodeRef(this.cell, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Row.conflict.UnexpectedColumnBind.primary
+                        ),
+                        new NodeRef(this.cell, locales, context)
                     ),
             },
             secondary: {
                 node: this.expression.type,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Row.conflict.UnexpectedColumnBind.secondary,
-                        new NodeRef(this.expression.type, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Row.conflict.UnexpectedColumnBind
+                                    .secondary
+                        ),
+                        new NodeRef(this.expression.type, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/UnexpectedEtc.ts b/src/conflicts/UnexpectedEtc.ts
index de0ad15c0..500d513cc 100644
--- a/src/conflicts/UnexpectedEtc.ts
+++ b/src/conflicts/UnexpectedEtc.ts
@@ -1,8 +1,8 @@
 import type Bind from '@nodes/Bind';
 import type Token from '@nodes/Token';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnexpectedEtc extends Conflict {
     readonly etc: Token;
@@ -17,8 +17,11 @@ export default class UnexpectedEtc extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.Bind.conflict.UnexpectedEtc),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.Bind.conflict.UnexpectedEtc)
+                    ),
             },
         };
     }
diff --git a/src/conflicts/UnexpectedInput.ts b/src/conflicts/UnexpectedInput.ts
index ae6a6ea1b..0ef7e7e8b 100644
--- a/src/conflicts/UnexpectedInput.ts
+++ b/src/conflicts/UnexpectedInput.ts
@@ -5,11 +5,11 @@ import type Bind from '@nodes/Bind';
 import type BinaryEvaluate from '@nodes/BinaryEvaluate';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import type Context from '@nodes/Context';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnexpectedInputs extends Conflict {
     readonly func: FunctionDefinition | StructureDefinition | StreamDefinition;
@@ -31,20 +31,27 @@ export default class UnexpectedInputs extends Conflict {
         return {
             primary: {
                 node: this.evaluate,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.UnexpectedInput.primary,
-                        new NodeRef(this.input, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.UnexpectedInput.primary
+                        ),
+                        new NodeRef(this.input, locales, context)
                     ),
             },
             secondary: {
                 node: this.input,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.UnexpectedInput.secondary,
-                        new NodeRef(this.input, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.UnexpectedInput
+                                    .secondary
+                        ),
+                        new NodeRef(this.input, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/UnexpectedTypeInput.ts b/src/conflicts/UnexpectedTypeInput.ts
index 48da60cc9..2b38b4cca 100644
--- a/src/conflicts/UnexpectedTypeInput.ts
+++ b/src/conflicts/UnexpectedTypeInput.ts
@@ -5,9 +5,9 @@ import type NameType from '@nodes/NameType';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnexpectedTypeInput extends Conflict {
     readonly evaluate: NameType | Evaluate;
@@ -29,29 +29,33 @@ export default class UnexpectedTypeInput extends Conflict {
         return {
             primary: {
                 node: this.type,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.UnexpectedTypeInput
-                            .primary,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.UnexpectedTypeInput
+                                    .primary
+                        ),
                         new NodeRef(
                             this.definition.names,
-                            locale,
+                            locales,
                             context,
-                            this.definition.names.getPreferredNameString([
-                                locale,
-                            ])
+                            locales.getName(this.definition.names)
                         )
                     ),
             },
             secondary: {
                 node: this.definition.names,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Evaluate.conflict.UnexpectedTypeInput
-                            .secondary,
-                        new NodeRef(this.type, locale, context)
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.UnexpectedTypeInput
+                                    .secondary
+                        ),
+                        new NodeRef(this.type, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/UnexpectedTypeVariable.ts b/src/conflicts/UnexpectedTypeVariable.ts
index 04e8942f1..c74e88aff 100644
--- a/src/conflicts/UnexpectedTypeVariable.ts
+++ b/src/conflicts/UnexpectedTypeVariable.ts
@@ -1,7 +1,7 @@
 import type Reference from '@nodes/Reference';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnexpectedTypeVariable extends Conflict {
     readonly name: Reference;
@@ -15,10 +15,13 @@ export class UnexpectedTypeVariable extends Conflict {
         return {
             primary: {
                 node: this.name,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Reference.conflict.UnexpectedTypeVariable
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Reference.conflict.UnexpectedTypeVariable
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/UnimplementedInterface.ts b/src/conflicts/UnimplementedInterface.ts
index e49a5f10d..f9b106df4 100644
--- a/src/conflicts/UnimplementedInterface.ts
+++ b/src/conflicts/UnimplementedInterface.ts
@@ -2,9 +2,9 @@ import type Context from '@nodes/Context';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnimplementedInterface extends Conflict {
     readonly structure: StructureDefinition;
@@ -26,24 +26,25 @@ export class UnimplementedInterface extends Conflict {
         return {
             primary: {
                 node: this.structure,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.StructureDefinition.conflict
-                            .UnimplementedInterface,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.StructureDefinition.conflict
+                                    .UnimplementedInterface
+                        ),
                         new NodeRef(
                             this.interfaceStructure,
-                            locale,
+                            locales,
                             context,
-                            this.interfaceStructure.names.getPreferredNameString(
-                                [locale]
-                            )
+                            locales.getName(this.interfaceStructure.names)
                         ),
                         new NodeRef(
                             this.fun,
-                            locale,
+                            locales,
                             context,
-                            this.fun.names.getPreferredNameString([locale])
+                            locales.getName(this.fun.names)
                         )
                     ),
             },
diff --git a/src/conflicts/UnknownBorrow.ts b/src/conflicts/UnknownBorrow.ts
index 13c4b66ad..dbf769d0f 100644
--- a/src/conflicts/UnknownBorrow.ts
+++ b/src/conflicts/UnknownBorrow.ts
@@ -1,7 +1,7 @@
 import type Borrow from '@nodes/Borrow';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnknownBorrow extends Conflict {
     readonly borrow: Borrow;
@@ -19,10 +19,10 @@ export class UnknownBorrow extends Conflict {
                     this.borrow.source === undefined
                         ? this.borrow.borrow
                         : this.borrow.source,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Borrow.conflict.UnknownBorrow
+                        locales,
+                        locales.get((l) => l.node.Borrow.conflict.UnknownBorrow)
                     ),
             },
         };
diff --git a/src/conflicts/UnknownColumn.ts b/src/conflicts/UnknownColumn.ts
index bdd787595..ee70106f1 100644
--- a/src/conflicts/UnknownColumn.ts
+++ b/src/conflicts/UnknownColumn.ts
@@ -1,8 +1,8 @@
 import type Expression from '@nodes/Expression';
 import type TableType from '@nodes/TableType';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnknownColumn extends Conflict {
     readonly type: TableType;
@@ -18,8 +18,11 @@ export default class UnknownColumn extends Conflict {
         return {
             primary: {
                 node: this.cell,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.Row.conflict.UnknownColumn),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.Row.conflict.UnknownColumn)
+                    ),
             },
         };
     }
diff --git a/src/conflicts/UnknownConversion.ts b/src/conflicts/UnknownConversion.ts
index fe70f4d69..606fccdc3 100644
--- a/src/conflicts/UnknownConversion.ts
+++ b/src/conflicts/UnknownConversion.ts
@@ -2,9 +2,9 @@ import type Context from '@nodes/Context';
 import type Convert from '@nodes/Convert';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnknownConversion extends Conflict {
     readonly convert: Convert;
@@ -20,12 +20,14 @@ export class UnknownConversion extends Conflict {
         return {
             primary: {
                 node: this.convert,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Convert.conflict.UnknownConversion,
-                        new NodeRef(this.expectedType, locale, context),
-                        new NodeRef(this.convert.type, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.Convert.conflict.UnknownConversion
+                        ),
+                        new NodeRef(this.expectedType, locales, context),
+                        new NodeRef(this.convert.type, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/UnknownInput.ts b/src/conflicts/UnknownInput.ts
index 6f36771e6..80b2bb38c 100644
--- a/src/conflicts/UnknownInput.ts
+++ b/src/conflicts/UnknownInput.ts
@@ -3,10 +3,10 @@ import Conflict from './Conflict';
 import type Bind from '@nodes/Bind';
 import type StructureDefinition from '@nodes/StructureDefinition';
 import type FunctionDefinition from '@nodes/FunctionDefinition';
-import type Locale from '@locale/Locale';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import concretize from '../locale/concretize';
 import type BinaryEvaluate from '../nodes/BinaryEvaluate';
+import type Locales from '../locale/Locales';
 
 export default class UnknownInput extends Conflict {
     readonly func: FunctionDefinition | StructureDefinition | StreamDefinition;
@@ -29,19 +29,23 @@ export default class UnknownInput extends Conflict {
         return {
             primary: {
                 node: this.given.names,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.Evaluate.conflict.UnknownInput.primary
+                        locales,
+                        locales.get(
+                            (l) => l.node.Evaluate.conflict.UnknownInput.primary
+                        )
                     ),
             },
             secondary: {
                 node: this.given.names,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.Evaluate.conflict.UnknownInput
-                            .secondary
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.Evaluate.conflict.UnknownInput.secondary
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/UnknownLanguage.ts b/src/conflicts/UnknownLanguage.ts
index 86a81ca72..e587bbe3c 100644
--- a/src/conflicts/UnknownLanguage.ts
+++ b/src/conflicts/UnknownLanguage.ts
@@ -1,8 +1,8 @@
 import type Language from '@nodes/Language';
 import type Token from '@nodes/Token';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnknownLanguage extends Conflict {
     readonly language: Language;
@@ -18,10 +18,12 @@ export default class UnknownLanguage extends Conflict {
         return {
             primary: {
                 node: this.language,
-                explanation: (locale: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        locale,
-                        locale.node.Language.conflict.UnknownLanguage
+                        locales,
+                        locales.get(
+                            (l) => l.node.Language.conflict.UnknownLanguage
+                        )
                     ),
             },
         };
diff --git a/src/conflicts/UnknownName.ts b/src/conflicts/UnknownName.ts
index df56c4af0..d31f643bb 100644
--- a/src/conflicts/UnknownName.ts
+++ b/src/conflicts/UnknownName.ts
@@ -2,11 +2,11 @@ import type Context from '@nodes/Context';
 import Token from '@nodes/Token';
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
 import type NameType from '../nodes/NameType';
 import type Reference from '../nodes/Reference';
+import type Locales from '../locale/Locales';
 
 export class UnknownName extends Conflict {
     readonly name: Reference | NameType | Token;
@@ -22,15 +22,17 @@ export class UnknownName extends Conflict {
         return {
             primary: {
                 node: this.name,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.Reference.conflict.UnknownName,
+                        locales,
+                        locales.get(
+                            (l) => l.node.Reference.conflict.UnknownName
+                        ),
                         this.name instanceof Token
                             ? undefined
-                            : new NodeRef(this.name, locale, context),
+                            : new NodeRef(this.name, locales, context),
                         this.type
-                            ? new NodeRef(this.type, locale, context)
+                            ? new NodeRef(this.type, locales, context)
                             : undefined
                     ),
             },
diff --git a/src/conflicts/UnknownTypeName.ts b/src/conflicts/UnknownTypeName.ts
index 280eed441..ff6e7eb54 100644
--- a/src/conflicts/UnknownTypeName.ts
+++ b/src/conflicts/UnknownTypeName.ts
@@ -2,9 +2,9 @@ import type Context from '@nodes/Context';
 import type Definition from '@nodes/Definition';
 import type NameType from '@nodes/NameType';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import Conflict from './Conflict';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnknownTypeName extends Conflict {
     readonly name: NameType;
@@ -20,11 +20,13 @@ export class UnknownTypeName extends Conflict {
         return {
             primary: {
                 node: this.name,
-                explanation: (locale: Locale, context: Context) =>
+                explanation: (locales: Locales, context: Context) =>
                     concretize(
-                        locale,
-                        locale.node.NameType.conflict.UnknownTypeName,
-                        new NodeRef(this.definition, locale, context)
+                        locales,
+                        locales.get(
+                            (l) => l.node.NameType.conflict.UnknownTypeName
+                        ),
+                        new NodeRef(this.definition, locales, context)
                     ),
             },
         };
diff --git a/src/conflicts/UnparsableConflict.ts b/src/conflicts/UnparsableConflict.ts
index e58e902e3..0e1e1bb16 100644
--- a/src/conflicts/UnparsableConflict.ts
+++ b/src/conflicts/UnparsableConflict.ts
@@ -1,8 +1,8 @@
 import Conflict from './Conflict';
 import type UnparsableType from '@nodes/UnparsableType';
 import UnparsableExpression from '@nodes/UnparsableExpression';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export class UnparsableConflict extends Conflict {
     readonly unparsable: UnparsableType | UnparsableExpression;
@@ -16,11 +16,14 @@ export class UnparsableConflict extends Conflict {
         return {
             primary: {
                 node: this.unparsable,
-                explanation: (translation: Locale) =>
+                explanation: (locales: Locales) =>
                     concretize(
-                        translation,
-                        translation.node.UnparsableExpression.conflict
-                            .UnparsableConflict,
+                        locales,
+                        locales.get(
+                            (l) =>
+                                l.node.UnparsableExpression.conflict
+                                    .UnparsableConflict
+                        ),
                         this.unparsable instanceof UnparsableExpression
                     ),
             },
diff --git a/src/conflicts/UnusedBind.ts b/src/conflicts/UnusedBind.ts
index 2e2698591..efcb99b0b 100644
--- a/src/conflicts/UnusedBind.ts
+++ b/src/conflicts/UnusedBind.ts
@@ -1,7 +1,7 @@
 import type Bind from '@nodes/Bind';
 import Conflict from './Conflict';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnusedBind extends Conflict {
     readonly bind: Bind;
@@ -16,8 +16,11 @@ export default class UnusedBind extends Conflict {
         return {
             primary: {
                 node: this.bind,
-                explanation: (locale: Locale) =>
-                    concretize(locale, locale.node.Bind.conflict.UnusedBind),
+                explanation: (locales: Locales) =>
+                    concretize(
+                        locales,
+                        locales.get((l) => l.node.Bind.conflict.UnusedBind)
+                    ),
             },
         };
     }
diff --git a/src/db/Database.ts b/src/db/Database.ts
index f1ffd929e..056a79231 100644
--- a/src/db/Database.ts
+++ b/src/db/Database.ts
@@ -213,10 +213,7 @@ export const animationFactor = Settings.settings.animationFactor.value;
 export const animationDuration = Settings.animationDuration;
 export const tutorialProgress = Settings.settings.tutorial.value;
 export const arrangement = Settings.settings.arrangement.value;
-export const locale = DB.Locales.locale;
 export const locales = DB.Locales.locales;
-export const languages = DB.Locales.languages;
-export const writingDirection = DB.Locales.writingDirection;
 export const writingLayout = Settings.settings.writingLayout.value;
 export const camera = Settings.settings.camera.value;
 export const dark = Settings.settings.dark.value;
diff --git a/src/db/GalleryDatabase.ts b/src/db/GalleryDatabase.ts
index 309b237b3..6f9423e97 100644
--- a/src/db/GalleryDatabase.ts
+++ b/src/db/GalleryDatabase.ts
@@ -17,10 +17,10 @@ import { firestore } from './firebase';
 import type { SerializedGallery } from '../models/Gallery';
 import { FirebaseError } from 'firebase/app';
 import { get, writable, type Writable } from 'svelte/store';
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import { toLocaleString } from '../locale/Locale';
 import { ExampleGalleries } from '../examples/examples';
+import type Locales from '../locale/Locales';
 
 export default class GalleryDatabase {
     /** The main database that manages this gallery database */
@@ -132,7 +132,7 @@ export default class GalleryDatabase {
     }
 
     /** Create a new gallery with this user as its curator. */
-    async create(locale: Locale): Promise<string | undefined> {
+    async create(locales: Locales): Promise<string | undefined> {
         const user = this.database.getUser();
         if (user === null) return undefined;
 
@@ -140,9 +140,11 @@ export default class GalleryDatabase {
 
         const id = uuidv4();
         const name: Record<string, string> = {};
-        name[toLocaleString(locale)] = locale.ui.gallery.untitled;
+        name[toLocaleString(locales.getLocales()[0])] = locales.get(
+            (l) => l.ui.gallery.untitled
+        );
         const description: Record<string, string> = {};
-        description[toLocaleString(locale)] = '';
+        description[toLocaleString(locales.getLocales()[0])] = '';
         const gallery: SerializedGallery = {
             id,
             path: null,
diff --git a/src/db/LocalesDatabase.ts b/src/db/LocalesDatabase.ts
index f2d0a1392..48ef9db42 100644
--- a/src/db/LocalesDatabase.ts
+++ b/src/db/LocalesDatabase.ts
@@ -1,7 +1,6 @@
-import { derived, get, writable, type Writable } from 'svelte/store';
+import { get, writable, type Writable } from 'svelte/store';
 import type Locale from '../locale/Locale';
 import type { Database } from './Database';
-import { getLanguageDirection } from '../locale/LanguageCode';
 import {
     SupportedLocales,
     type SupportedLocale,
@@ -13,7 +12,8 @@ import type Setting from './Setting';
 import type LanguageCode from '../locale/LanguageCode';
 import type { RegionCode } from '../locale/Regions';
 import type Tutorial from '../tutorial/Tutorial';
-import DefaultLocale from '../locale/DefaultLocale';
+import DefaultLocale, { DefaultLocales } from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 /** A cache of locales loaded */
 export default class LocalesDatabase {
@@ -23,15 +23,8 @@ export default class LocalesDatabase {
     /** The default locale */
     private readonly defaultLocale: Locale;
 
-    /** Derived stores based on selected locales. */
-    readonly locales: Writable<Locale[]> = writable([DefaultLocale]);
-    readonly locale = derived(this.locales, ($locales) => $locales[0]);
-    readonly languages = derived(this.locales, ($locales) =>
-        $locales.map((locale) => locale.language)
-    );
-    readonly writingDirection = derived(this.locales, ($locales) =>
-        getLanguageDirection($locales[0].language)
-    );
+    /** A reactive store of preferred locales based on the selected languages. */
+    readonly locales: Writable<Locales> = writable(DefaultLocales);
 
     /** The locales loaded, loading, or failed to load. */
     private localesLoaded: Record<
@@ -87,7 +80,7 @@ export default class LocalesDatabase {
         Fonts.loadLocales(locales);
 
         // Update the locales stores
-        this.locales.set(this.computeLocales());
+        this.locales.set(new Locales(this.computeLocales(), DefaultLocale));
 
         return locales;
     }
@@ -135,11 +128,14 @@ export default class LocalesDatabase {
         } else return current;
     }
 
-    getLocales(): Locale[] {
-        // Map preferred languages into locales, filtering out missing locales and unloaded locales.
+    getLocaleSet() {
         return get(this.locales);
     }
 
+    getLocales(): Locale[] {
+        return get(this.locales).getLocales();
+    }
+
     getLocale(): Locale {
         return this.getLocales()[0];
     }
@@ -158,7 +154,7 @@ export default class LocalesDatabase {
     }
 
     getLocaleBasis(): Basis {
-        return Basis.getLocalizedBasis(this.getLocales());
+        return Basis.getLocalizedBasis(this.getLocaleSet());
     }
 
     getLanguages(): LanguageCode[] {
@@ -166,7 +162,7 @@ export default class LocalesDatabase {
     }
 
     getWritingDirection() {
-        return get(this.writingDirection);
+        return get(this.locales).getDirection();
     }
 
     /** Set the languages, load all locales if they aren't loaded, revise all projects to include any new locales, and save the new configuration. */
diff --git a/src/edit/Append.ts b/src/edit/Append.ts
index 3973389b9..9dd4f5207 100644
--- a/src/edit/Append.ts
+++ b/src/edit/Append.ts
@@ -4,9 +4,9 @@ import type { Edit } from '../components/editor/util/Commands';
 import Refer from './Refer';
 import Caret from './Caret';
 import type Context from '@nodes/Context';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
 import Bind from '../nodes/Bind';
+import type Locales from '../locale/Locales';
 
 export default class Append<NodeType extends Node> extends Revision {
     readonly parent: Node;
@@ -49,7 +49,7 @@ export default class Append<NodeType extends Node> extends Revision {
         );
     }
 
-    getEdit(locales: Locale[]): Edit | undefined {
+    getEdit(locales: Locales): Edit | undefined {
         const [newChild, newParent] = this.getEditedNode(locales);
 
         // Find the space before the insertion by finding the token that contains the index.
@@ -95,7 +95,7 @@ export default class Append<NodeType extends Node> extends Revision {
         ];
     }
 
-    getEditedNode(locales: Locale[]): [Node, Node] {
+    getEditedNode(locales: Locales): [Node, Node] {
         // Get the node to insert.
         const newChild = this.getNewNode(locales);
 
@@ -113,15 +113,19 @@ export default class Append<NodeType extends Node> extends Revision {
         return [newChild, newParent];
     }
 
-    getDescription(locale: Locale) {
+    getDescription(locales: Locales) {
         const node =
             this.insertion instanceof Refer
-                ? this.insertion.getNode([locale])
-                : this.getNewNode([locale]);
-        return concretize(locale, locale.ui.edit.append, node.getLabel(locale));
+                ? this.insertion.getNode(locales)
+                : this.getNewNode(locales);
+        return concretize(
+            locales,
+            locales.get((l) => l.ui.edit.append),
+            node.getLabel(locales)
+        );
     }
 
-    getNewNode(locales: Locale[]): Node {
+    getNewNode(locales: Locales): Node {
         if (this.insertion instanceof Node) return this.insertion;
         else return this.insertion.getNode(locales);
     }
diff --git a/src/edit/Assign.ts b/src/edit/Assign.ts
index 8f3c745cf..3c5b0ff80 100644
--- a/src/edit/Assign.ts
+++ b/src/edit/Assign.ts
@@ -4,8 +4,8 @@ import Node from '@nodes/Node';
 import Refer from './Refer';
 import Caret from './Caret';
 import type Context from '@nodes/Context';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 /** Set a field on a child */
 export default class Assign<NodeType extends Node> extends Revision {
@@ -41,7 +41,7 @@ export default class Assign<NodeType extends Node> extends Revision {
         return false;
     }
 
-    getNewNode(locales: Locale[]) {
+    getNewNode(locales: Locales) {
         return this.child === undefined
             ? undefined
             : this.child instanceof Node
@@ -49,13 +49,13 @@ export default class Assign<NodeType extends Node> extends Revision {
             : this.child.getNode(locales);
     }
 
-    getEditedNode(locales: Locale[]): [Node, Node] {
+    getEditedNode(locales: Locales): [Node, Node] {
         const newNode = this.getNewNode(locales);
         const newParent = this.parent.replace(this.field, newNode);
         return [newNode ?? newParent, newParent];
     }
 
-    getEdit(locale: Locale[]): Edit | undefined {
+    getEdit(locale: Locales): Edit | undefined {
         const [newNode, newParent] = this.getEditedNode(locale);
 
         const existingChild = this.parent.getField(this.field);
@@ -112,16 +112,16 @@ export default class Assign<NodeType extends Node> extends Revision {
               ];
     }
 
-    getDescription(locale: Locale) {
+    getDescription(locales: Locales) {
         const node =
             this.child instanceof Refer
-                ? this.child.getNode([locale])
-                : this.getNewNode([locale]);
+                ? this.child.getNode(locales)
+                : this.getNewNode(locales);
         return concretize(
-            locale,
-            locale.ui.edit.assign,
+            locales,
+            locales.get((l) => l.ui.edit.assign),
             this.field,
-            node?.getLabel(locale)
+            node?.getLabel(locales)
         );
     }
 
diff --git a/src/edit/Autocomplete.test.ts b/src/edit/Autocomplete.test.ts
index bcc41e205..a8b308252 100644
--- a/src/edit/Autocomplete.test.ts
+++ b/src/edit/Autocomplete.test.ts
@@ -10,7 +10,7 @@ import NumberLiteral from '../nodes/NumberLiteral';
 import Append from './Append';
 import Reference from '../nodes/Reference';
 import type Revision from './Revision';
-import DefaultLocale from '../locale/DefaultLocale';
+import DefaultLocale, { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     ['blank program suggestions', '**', undefined, Append, '0'],
@@ -119,12 +119,12 @@ test.each([
                 undefined,
                 undefined
             );
-            const transforms = getEditsAt(project, caret);
+            const transforms = getEditsAt(project, caret, DefaultLocales);
 
             const match = transforms.find(
                 (transform) =>
                     transform instanceof kind &&
-                    transform.getNewNode([])?.toWordplay() === edit
+                    transform.getNewNode(DefaultLocales)?.toWordplay() === edit
             );
             if (match === undefined) {
                 console.error(
@@ -132,14 +132,14 @@ test.each([
                         .map(
                             (t) =>
                                 `${t.constructor.name}\t${t
-                                    .getNewNode([])
+                                    .getNewNode(DefaultLocales)
                                     ?.toWordplay()}`
                         )
                         .join('\n')
                 );
             }
 
-            expect(match?.getNewNode([])?.toWordplay()).toBe(edit);
+            expect(match?.getNewNode(DefaultLocales)?.toWordplay()).toBe(edit);
         }
     }
 );
diff --git a/src/edit/Autocomplete.ts b/src/edit/Autocomplete.ts
index dde60a781..2584e27d0 100644
--- a/src/edit/Autocomplete.ts
+++ b/src/edit/Autocomplete.ts
@@ -72,6 +72,7 @@ import Select from '../nodes/Select';
 import Delete from '../nodes/Delete';
 import Update from '../nodes/Update';
 import Changed from '../nodes/Changed';
+import type Locales from '../locale/Locales';
 
 /** A logging flag, helpful for analyzing the control flow of autocomplete when debugging. */
 const LOG = false;
@@ -80,7 +81,11 @@ function note(message: string, level: number) {
 }
 
 /** Given a project and a caret, generate a set of transforms that can be applied at the location. */
-export function getEditsAt(project: Project, caret: Caret): Revision[] {
+export function getEditsAt(
+    project: Project,
+    caret: Caret,
+    locales: Locales
+): Revision[] {
     const source = caret.source;
     const context = project.getContext(source);
 
@@ -125,7 +130,8 @@ export function getEditsAt(project: Project, caret: Caret): Revision[] {
                     caret.position,
                     adjacent,
                     isEmptyLine,
-                    context
+                    context,
+                    locales
                 ),
             ];
         }
@@ -141,7 +147,8 @@ export function getEditsAt(project: Project, caret: Caret): Revision[] {
                     caret.position,
                     adjacent,
                     isEmptyLine,
-                    context
+                    context,
+                    locales
                 ),
             ];
         }
@@ -309,7 +316,8 @@ function getRelativeFieldEdits(
     adjacent: boolean,
     /** True if the line the caret is on is empty */
     empty: boolean,
-    context: Context
+    context: Context,
+    locales: Locales
 ): Revision[] {
     let edits: Revision[] = [];
 
@@ -364,7 +372,7 @@ function getRelativeFieldEdits(
                                         anchorNode,
                                         replacement instanceof Node
                                             ? replacement
-                                            : replacement.getNode([])
+                                            : replacement.getNode(locales)
                                     ))
                         )
                         // Convert the matching nodes to replacements.
diff --git a/src/edit/Caret.ts b/src/edit/Caret.ts
index 6e9427d8e..726bb0ee4 100644
--- a/src/edit/Caret.ts
+++ b/src/edit/Caret.ts
@@ -1383,14 +1383,14 @@ export default class Caret {
         conflicts: Conflict[],
         context: Context
     ): string {
-        const locale = context.getBasis().locales[0];
+        const locales = context.getBasis().locales;
 
         /** Get description of conflicts */
         const conflictDescription =
             conflicts.length > 0
                 ? concretize(
-                      locale,
-                      locale.ui.edit.conflicts,
+                      locales,
+                      locales.get((l) => l.ui.edit.conflicts),
                       conflicts.length
                   ).toText()
                 : undefined;
@@ -1401,15 +1401,15 @@ export default class Caret {
     }
 
     getPositionDescription(type: Type | undefined, context: Context) {
-        const locale = context.getBasis().locales[0];
+        const locales = context.getBasis().locales;
 
         /** If the caret is a node, describe the node. */
         if (this.position instanceof Node) {
             return concretize(
-                locale,
-                locale.ui.edit.node,
-                new NodeRef(this.position, locale, context),
-                type ? new NodeRef(type, locale, context) : undefined
+                locales,
+                locales.get((l) => l.ui.edit.node),
+                new NodeRef(this.position, locales, context),
+                type ? new NodeRef(type, locales, context) : undefined
             ).toText();
         }
 
@@ -1419,37 +1419,37 @@ export default class Caret {
 
         if (this.tokenExcludingSpace && this.isInsideText()) {
             return concretize(
-                locale,
-                locale.ui.edit.inside,
-                new NodeRef(this.tokenExcludingSpace, locale, context)
+                locales,
+                locales.get((l) => l.ui.edit.inside),
+                new NodeRef(this.tokenExcludingSpace, locales, context)
             ).toText();
         } else if (this.isEmptyLine()) {
             return concretize(
-                locale,
-                locale.ui.edit.line,
+                locales,
+                locales.get((l) => l.ui.edit.line),
                 beforeNode
-                    ? new NodeRef(beforeNode, locale, context)
+                    ? new NodeRef(beforeNode, locales, context)
                     : undefined,
-                afterNode ? new NodeRef(afterNode, locale, context) : undefined
+                afterNode ? new NodeRef(afterNode, locales, context) : undefined
             ).toText();
         } else if (this.tokenIncludingSpace) {
             if (this.tokenPrior && this.tokenPrior !== this.tokenIncludingSpace)
                 return concretize(
-                    locale,
-                    locale.ui.edit.between,
+                    locales,
+                    locales.get((l) => l.ui.edit.between),
                     beforeNode
-                        ? new NodeRef(beforeNode, locale, context)
+                        ? new NodeRef(beforeNode, locales, context)
                         : undefined,
                     afterNode
-                        ? new NodeRef(afterNode, locale, context)
+                        ? new NodeRef(afterNode, locales, context)
                         : undefined
                 ).toText();
             else
                 return concretize(
-                    locale,
-                    locale.ui.edit.before,
+                    locales,
+                    locales.get((l) => l.ui.edit.before),
                     afterNode
-                        ? new NodeRef(afterNode, locale, context)
+                        ? new NodeRef(afterNode, locales, context)
                         : undefined
                 ).toText();
         }
diff --git a/src/edit/GroupProperties.ts b/src/edit/GroupProperties.ts
index 4c22bb77a..f8198e595 100644
--- a/src/edit/GroupProperties.ts
+++ b/src/edit/GroupProperties.ts
@@ -1,4 +1,3 @@
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import Evaluate from '../nodes/Evaluate';
 import type Expression from '../nodes/Expression';
@@ -7,14 +6,15 @@ import Reference from '../nodes/Reference';
 import OutputProperty from './OutputProperty';
 import OutputPropertyOptions from './OutputPropertyOptions';
 import { getTypeOutputProperties } from './OutputProperties';
+import type Locales from '../locale/Locales';
 
 export default function getGroupProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Group.layout,
+            locales.get((l) => l.output.Group.layout),
             new OutputPropertyOptions(
                 Object.values(project.shares.output)
                     .filter((type) =>
@@ -34,25 +34,23 @@ export default function getGroupProperties(
             true,
             false,
             () => true,
-            (languages) =>
+            (locales) =>
                 Evaluate.make(
                     Reference.make(
-                        project.shares.output.Stack.names.getPreferredNameString(
-                            languages
-                        ),
+                        locales.getName(project.shares.output.Stack.names),
                         project.shares.output.Stack
                     ),
                     []
                 )
         ),
         new OutputProperty(
-            locale.output.Group.content,
+            locales.get((l) => l.output.Group.content),
             'content',
             true,
             false,
             (expr) => expr instanceof ListLiteral,
             () => ListLiteral.make([])
         ),
-        ...getTypeOutputProperties(project, locale),
+        ...getTypeOutputProperties(project, locales),
     ];
 }
diff --git a/src/edit/OutputExpression.ts b/src/edit/OutputExpression.ts
index c20971806..25d88ae43 100644
--- a/src/edit/OutputExpression.ts
+++ b/src/edit/OutputExpression.ts
@@ -12,7 +12,7 @@ import getStageProperties from './StageProperties';
 import getGroupProperties from './GroupProperties';
 import getPhraseProperties from './PhraseProperties';
 import getShapeProperties from './getShapeProperties';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 /**
  * Represents the value of a property. If given is true, it means its set explicitly.
@@ -41,9 +41,9 @@ export default class OutputExpression {
     readonly node: Evaluate;
 
     /** The locales currently active */
-    readonly locales: Locale[];
+    readonly locales: Locales;
 
-    constructor(project: Project, evaluate: Evaluate, locales: Locale[]) {
+    constructor(project: Project, evaluate: Evaluate, locales: Locales) {
         this.project = project;
         this.node = evaluate;
         this.locales = locales;
@@ -77,7 +77,7 @@ export default class OutputExpression {
 
         // What type of output is this?
         const type = this.getType();
-        const locale = this.project.basis.locales[0];
+        const locales = this.project.basis.locales;
 
         // We handle pose types differently, so we return an empty list here.
         return type === this.project.shares.output.Pose
@@ -86,13 +86,13 @@ export default class OutputExpression {
               [
                   // Add output type specific properties first
                   ...(type === this.project.shares.output.Phrase
-                      ? getPhraseProperties(this.project, locale)
+                      ? getPhraseProperties(this.project, locales)
                       : type === this.project.shares.output.Group
-                      ? getGroupProperties(this.project, locale)
+                      ? getGroupProperties(this.project, locales)
                       : type === this.project.shares.output.Stage
-                      ? getStageProperties(this.project, locale)
+                      ? getStageProperties(this.project, locales)
                       : type === this.project.shares.output.Shape
-                      ? getShapeProperties(this.project, locale)
+                      ? getShapeProperties(this.project, locales)
                       : []),
               ];
     }
diff --git a/src/edit/OutputProperties.ts b/src/edit/OutputProperties.ts
index b342e27f0..712baee20 100644
--- a/src/edit/OutputProperties.ts
+++ b/src/edit/OutputProperties.ts
@@ -12,10 +12,10 @@ import OutputPropertyOptions from './OutputPropertyOptions';
 import OutputPropertyRange from './OutputPropertyRange';
 import Reference from '../nodes/Reference';
 import type Project from '../models/Project';
-import type Locale from '../locale/Locale';
 import type { NameAndDoc, NameText } from '../locale/Locale';
 import getPoseProperties from './PoseProperties';
 import BooleanLiteral from '../nodes/BooleanLiteral';
+import type Locales from '../locale/Locales';
 
 function getPoseProperty(project: Project, name: NameAndDoc): OutputProperty {
     return new OutputProperty(
@@ -31,9 +31,9 @@ function getPoseProperty(project: Project, name: NameAndDoc): OutputProperty {
     );
 }
 
-export function getDurationProperty(locale: Locale): OutputProperty {
+export function getDurationProperty(locales: Locales): OutputProperty {
     return new OutputProperty(
-        locale.output.Phrase.duration,
+        locales.get((l) => l.output.Phrase.duration),
         new OutputPropertyRange(0, 2, 0.25, 's', 2),
         false,
         false,
@@ -42,11 +42,11 @@ export function getDurationProperty(locale: Locale): OutputProperty {
     );
 }
 
-export function getStyleProperty(locale: Locale): OutputProperty {
+export function getStyleProperty(locales: Locales): OutputProperty {
     return new OutputProperty(
-        locale.output.Phrase.style,
+        locales.get((l) => l.output.Phrase.style),
         new OutputPropertyOptions(
-            Object.values(locale.output.Easing).reduce(
+            Object.values(locales.get((l) => l.output.Easing)).reduce(
                 (all: string[], next: NameText) => [
                     ...all,
                     ...(Array.isArray(next) ? next : [next]),
@@ -57,7 +57,7 @@ export function getStyleProperty(locale: Locale): OutputProperty {
             (text: string) => TextLiteral.make(text),
             (expression: Expression | undefined) =>
                 expression instanceof TextLiteral
-                    ? expression.getValue([locale]).text
+                    ? expression.getValue(locales).text
                     : undefined
         ),
         false,
@@ -70,11 +70,11 @@ export function getStyleProperty(locale: Locale): OutputProperty {
 // All type output has these properties.
 export function getTypeOutputProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Phrase.size,
+            locales.get((l) => l.output.Phrase.size),
             new OutputPropertyRange(0.25, 32, 0.25, 'm', 2),
             false,
             true,
@@ -82,23 +82,23 @@ export function getTypeOutputProperties(
             () => NumberLiteral.make(1, Unit.meters())
         ),
         new OutputProperty(
-            locale.output.Phrase.face,
+            locales.get((l) => l.output.Phrase.face),
             new OutputPropertyOptions(
                 [...SupportedFaces],
                 true,
                 (text: string) => TextLiteral.make(text),
                 (expression: Expression | undefined) =>
                     expression instanceof TextLiteral
-                        ? expression.getValue([locale]).text
+                        ? expression.getValue(locales).text
                         : undefined
             ),
             false,
             true,
             (expr) => expr instanceof TextLiteral,
-            () => TextLiteral.make(locale.ui.font.app)
+            () => TextLiteral.make(locales.get((l) => l.ui.font.app))
         ),
         new OutputProperty(
-            locale.output.Phrase.place,
+            locales.get((l) => l.output.Phrase.place),
             'place',
             false,
             false,
@@ -107,12 +107,10 @@ export function getTypeOutputProperties(
                 (expr.is(project.shares.output.Place, context) ||
                     expr.is(project.shares.input.Motion, context) ||
                     expr.is(project.shares.input.Placement, context)),
-            (locale) =>
+            (locales) =>
                 Evaluate.make(
                     Reference.make(
-                        project.shares.output.Place.names.getPreferredNameString(
-                            locale
-                        ),
+                        locales.getName(project.shares.output.Place.names),
                         project.shares.output.Place
                     ),
                     [
@@ -122,7 +120,7 @@ export function getTypeOutputProperties(
                     ]
                 )
         ),
-        ...getOutputProperties(project, locale),
+        ...getOutputProperties(project, locales),
     ];
 }
 
@@ -130,11 +128,11 @@ export function getTypeOutputProperties(
 // All type output has these properties, in this order.
 export function getOutputProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Phrase.name,
+            locales.get((l) => l.output.Phrase.name),
             new OutputPropertyText(() => true),
             false,
             false,
@@ -142,19 +140,31 @@ export function getOutputProperties(
             () => TextLiteral.make('')
         ),
         new OutputProperty(
-            locale.output.Phrase.selectable,
+            locales.get((l) => l.output.Phrase.selectable),
             'bool',
             false,
             false,
             (expr) => expr instanceof BooleanLiteral,
             () => BooleanLiteral.make(false)
         ),
-        ...getPoseProperties(project, locale, true),
-        getPoseProperty(project, locale.output.Phrase.entering),
-        getPoseProperty(project, locale.output.Phrase.resting),
-        getPoseProperty(project, locale.output.Phrase.moving),
-        getPoseProperty(project, locale.output.Phrase.exiting),
-        getDurationProperty(locale),
-        getStyleProperty(locale),
+        ...getPoseProperties(project, locales, true),
+        getPoseProperty(
+            project,
+            locales.get((l) => l.output.Phrase.entering)
+        ),
+        getPoseProperty(
+            project,
+            locales.get((l) => l.output.Phrase.resting)
+        ),
+        getPoseProperty(
+            project,
+            locales.get((l) => l.output.Phrase.moving)
+        ),
+        getPoseProperty(
+            project,
+            locales.get((l) => l.output.Phrase.exiting)
+        ),
+        getDurationProperty(locales),
+        getStyleProperty(locales),
     ];
 }
diff --git a/src/edit/OutputProperty.ts b/src/edit/OutputProperty.ts
index 8ca29f8a9..ce2daae1f 100644
--- a/src/edit/OutputProperty.ts
+++ b/src/edit/OutputProperty.ts
@@ -3,8 +3,8 @@ import type OutputPropertyOptions from './OutputPropertyOptions';
 import type OutputPropertyText from './OutputPropertyText';
 import type Expression from '@nodes/Expression';
 import type Context from '@nodes/Context';
-import type Locale from '../locale/Locale';
 import { getFirstName, type NameAndDoc } from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 type OutputPropertyType =
     | OutputPropertyRange
@@ -31,7 +31,7 @@ class OutputProperty {
     /** A function that determines whether an Expression set on the property can be edited using the output editing controls. */
     readonly editable: (expr: Expression, context: Context) => boolean;
     /** A function that produces an initial value for an unset property */
-    readonly create: (locales: Locale[]) => Expression;
+    readonly create: (locales: Locales) => Expression;
 
     constructor(
         name: NameAndDoc,
@@ -39,7 +39,7 @@ class OutputProperty {
         required: boolean,
         inherited: boolean,
         editable: (expr: Expression, context: Context) => boolean,
-        create: (locales: Locale[]) => Expression
+        create: (locales: Locales) => Expression
     ) {
         this.name = name;
         this.type = type;
diff --git a/src/edit/OutputPropertyValueSet.ts b/src/edit/OutputPropertyValueSet.ts
index 71ae1fcde..269e1dbfe 100644
--- a/src/edit/OutputPropertyValueSet.ts
+++ b/src/edit/OutputPropertyValueSet.ts
@@ -16,6 +16,7 @@ import MarkupValue from '@values/MarkupValue';
 import type Locale from '../locale/Locale';
 import type StructureDefinition from '../nodes/StructureDefinition';
 import type StreamDefinition from '../nodes/StreamDefinition';
+import type Locales from '../locale/Locales';
 
 /**
  * Represents one or more equivalent inputs to an output expression.
@@ -88,7 +89,7 @@ export default class OutputPropertyValueSet {
 
     getOutputExpressions(
         project: Project,
-        locales: Locale[]
+        locales: Locales
     ): OutputExpression[] {
         return this.values
             .filter(
@@ -144,10 +145,6 @@ export default class OutputPropertyValueSet {
             : undefined;
     }
 
-    getName() {
-        return this.property.name;
-    }
-
     getExpressions(): Evaluate[] {
         return this.values.map((value) => value.evaluate);
     }
@@ -164,12 +161,12 @@ export default class OutputPropertyValueSet {
         return this.values.some((val) => val.given);
     }
 
-    getDocs(locales: Locale[]) {
+    getDocs(locales: Locales) {
         return this.values[0]?.bind.docs?.getPreferredLocale(locales);
     }
 
     /** Given a project, unsets this property on expressions on which it is set. */
-    unset(projects: Database, project: Project, locales: Locale[]) {
+    unset(projects: Database, project: Project, locales: Locales) {
         // Find all the values that are given, then map them to [ Evaluate, Evaluate ] pairs
         // that represent the original Evaluate and the replacement without the given value.
         // If the property is required, replace with a default value.
@@ -188,7 +185,7 @@ export default class OutputPropertyValueSet {
     }
 
     /** Given a project, set this property to a reasonable starting value */
-    set(db: Database, project: Project, locales: Locale[]) {
+    set(db: Database, project: Project, locales: Locales) {
         db.Projects.revise(
             project,
             project.getBindReplacements(
diff --git a/src/edit/PhraseProperties.ts b/src/edit/PhraseProperties.ts
index 367d3fb43..f70643f11 100644
--- a/src/edit/PhraseProperties.ts
+++ b/src/edit/PhraseProperties.ts
@@ -1,5 +1,4 @@
 import TextLiteral from '@nodes/TextLiteral';
-import type Locale from '../locale/Locale';
 import OutputProperty from './OutputProperty';
 import OutputPropertyText from './OutputPropertyText';
 import Language from '../nodes/Language';
@@ -10,23 +9,24 @@ import Unit from '../nodes/Unit';
 import OutputPropertyOptions from './OutputPropertyOptions';
 import { getTypeOutputProperties } from './OutputProperties';
 import type Project from '../models/Project';
+import type Locales from '../locale/Locales';
 
 export default function getPhraseProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Phrase.text,
+            locales.get((l) => l.output.Phrase.text),
             new OutputPropertyText(() => true),
             true,
             false,
             (expr) => expr instanceof TextLiteral || expr instanceof Docs,
             (locales) =>
-                TextLiteral.make('', Language.make(locales[0].language))
+                TextLiteral.make('', Language.make(locales.getLanguages()[0]))
         ),
         new OutputProperty(
-            locale.output.Phrase.wrap,
+            locales.get((l) => l.output.Phrase.wrap),
             new OutputPropertyRange(1, 30, 1, 'm'),
             false,
             false,
@@ -34,7 +34,7 @@ export default function getPhraseProperties(
             () => NumberLiteral.make('10', Unit.meters())
         ),
         new OutputProperty(
-            locale.output.Phrase.alignment,
+            locales.get((l) => l.output.Phrase.alignment),
             new OutputPropertyOptions(
                 ['<', '|', '>'],
                 true,
@@ -47,6 +47,6 @@ export default function getPhraseProperties(
             (expr) => expr instanceof TextLiteral,
             () => TextLiteral.make('|')
         ),
-        ...getTypeOutputProperties(project, locale),
+        ...getTypeOutputProperties(project, locales),
     ];
 }
diff --git a/src/edit/PoseProperties.ts b/src/edit/PoseProperties.ts
index d6ad88160..6e25e39ab 100644
--- a/src/edit/PoseProperties.ts
+++ b/src/edit/PoseProperties.ts
@@ -4,19 +4,19 @@ import NumberLiteral from '../nodes/NumberLiteral';
 import Reference from '../nodes/Reference';
 import Unit from '../nodes/Unit';
 import { createColorLiteral } from '../output/Color';
-import type Locale from '../locale/Locale';
 import OutputProperty from './OutputProperty';
 import OutputPropertyRange from './OutputPropertyRange';
 import type Project from '../models/Project';
+import type Locales from '../locale/Locales';
 
 export default function getPoseProperties(
     project: Project,
-    locale: Locale,
+    locales: Locales,
     background: boolean
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Pose.color,
+            locales.get((l) => l.output.Pose.color),
             'color',
             false,
             true,
@@ -26,7 +26,7 @@ export default function getPoseProperties(
             (locales) => createColorLiteral(project, locales, 0.5, 100, 180)
         ),
         new OutputProperty(
-            locale.output.Pose.opacity,
+            locales.get((l) => l.output.Pose.opacity),
             new OutputPropertyRange(0, 1, 0.01, '%', 0),
             false,
             false,
@@ -36,7 +36,7 @@ export default function getPoseProperties(
         ...(background
             ? [
                   new OutputProperty(
-                      locale.output.Phrase.background,
+                      locales.get((l) => l.output.Phrase.background),
                       'color' as const,
                       false,
                       false,
@@ -49,7 +49,7 @@ export default function getPoseProperties(
               ]
             : []),
         new OutputProperty(
-            locale.output.Pose.scale,
+            locales.get((l) => l.output.Pose.scale),
             new OutputPropertyRange(0, 10, 0.25, '', 2),
             false,
             false,
@@ -57,7 +57,7 @@ export default function getPoseProperties(
             () => NumberLiteral.make(1)
         ),
         new OutputProperty(
-            locale.output.Pose.rotation,
+            locales.get((l) => l.output.Pose.rotation),
             new OutputPropertyRange(0, 360, 1, '°'),
             false,
             false,
@@ -65,7 +65,7 @@ export default function getPoseProperties(
             () => NumberLiteral.make(0, Unit.create(['°']))
         ),
         new OutputProperty(
-            locale.output.Pose.offset,
+            locales.get((l) => l.output.Pose.offset),
             'place',
             false,
             false,
@@ -75,9 +75,7 @@ export default function getPoseProperties(
             (locales) =>
                 Evaluate.make(
                     Reference.make(
-                        project.shares.output.Place.names.getPreferredNameString(
-                            locales
-                        ),
+                        locales.getName(project.shares.output.Place.names),
                         project.shares.output.Place
                     ),
                     [
@@ -88,7 +86,7 @@ export default function getPoseProperties(
                 )
         ),
         new OutputProperty(
-            locale.output.Pose.flipx,
+            locales.get((l) => l.output.Pose.flipx),
             'bool',
             false,
             false,
@@ -96,7 +94,7 @@ export default function getPoseProperties(
             () => BooleanLiteral.make(false)
         ),
         new OutputProperty(
-            locale.output.Pose.flipy,
+            locales.get((l) => l.output.Pose.flipy),
             'bool',
             false,
             false,
diff --git a/src/edit/Refer.ts b/src/edit/Refer.ts
index 29bfec1ac..3135a0f21 100644
--- a/src/edit/Refer.ts
+++ b/src/edit/Refer.ts
@@ -2,7 +2,7 @@ import type Definition from '@nodes/Definition';
 import TypeVariable from '@nodes/TypeVariable';
 import type Context from '@nodes/Context';
 import type Node from '@nodes/Node';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class Refer {
     readonly creator: (name: string, operator?: string) => Node;
@@ -16,9 +16,9 @@ export default class Refer {
         this.definition = definition;
     }
 
-    getNode(locales: Locale[]) {
+    getNode(locales: Locales) {
         return this.creator(
-            this.definition.getPreferredName(locales),
+            this.definition.getPreferredName(locales.getLocales()),
             this.definition.names.getSymbolicName()
         );
     }
diff --git a/src/edit/Remove.ts b/src/edit/Remove.ts
index 4f1fd697c..401d76ab3 100644
--- a/src/edit/Remove.ts
+++ b/src/edit/Remove.ts
@@ -3,8 +3,8 @@ import Revision from './Revision';
 import type Node from '@nodes/Node';
 import Caret from './Caret';
 import type Context from '@nodes/Context';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 /**
  * Remove one or more nodes from sequence of nodes in a parent.
@@ -108,11 +108,11 @@ export default class Remove extends Revision {
         return parent;
     }
 
-    getDescription(locale: Locale) {
+    getDescription(locales: Locales) {
         return concretize(
-            locale,
-            locale.ui.edit.remove,
-            this.getNewNode().getLabel(locale)
+            locales,
+            locales.get((l) => l.ui.edit.remove),
+            this.getNewNode().getLabel(locales)
         );
     }
 
diff --git a/src/edit/Replace.ts b/src/edit/Replace.ts
index b9f71ff4a..f0d7fb8c5 100644
--- a/src/edit/Replace.ts
+++ b/src/edit/Replace.ts
@@ -8,6 +8,7 @@ import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
 import Markup from '../nodes/Markup';
 import Reference from '../nodes/Reference';
+import type Locales from '../locale/Locales';
 
 export default class Replace<NodeType extends Node> extends Revision {
     readonly parent: Node;
@@ -40,7 +41,7 @@ export default class Replace<NodeType extends Node> extends Revision {
     }
 
     /** True if the replacement node has a reference prefixed by a reference in the original node */
-    isCompletion(): boolean {
+    isCompletion(locales: Locales): boolean {
         if (this.replacement === undefined) return false;
         const original = this.node
             .nodes()
@@ -48,7 +49,7 @@ export default class Replace<NodeType extends Node> extends Revision {
         const replacement = (
             this.replacement instanceof Node
                 ? this.replacement
-                : this.replacement.getNode([])
+                : this.replacement.getNode(locales)
         )
             .nodes()
             .filter((node): node is Reference => node instanceof Reference);
@@ -61,7 +62,7 @@ export default class Replace<NodeType extends Node> extends Revision {
         );
     }
 
-    getEdit(locales: Locale[]): Edit | undefined {
+    getEdit(locales: Locales): Edit | undefined {
         const [replacement, newParent] = this.getEditedNode(locales);
 
         // Get the position of the node we're replacing.
@@ -110,29 +111,30 @@ export default class Replace<NodeType extends Node> extends Revision {
         ];
     }
 
-    getEditedNode(locales: Locale[]): [Node, Node] {
+    getEditedNode(locales: Locales): [Node, Node] {
         // Get or create the replacement with the original node's space.
         const replacement = this.getNewNode(locales);
         const newParent = this.parent.replace(this.node, replacement);
         return [replacement ?? newParent, newParent];
     }
 
-    getNewNode(locales: Locale[]) {
+    getNewNode(locales: Locales) {
         if (this.replacement instanceof Node) return this.replacement;
 
         return this.replacement?.getNode(locales);
     }
 
-    getDescription(locale: Locale) {
-        if (this.description) return Markup.words(this.description(locale));
+    getDescription(locales: Locales) {
+        if (this.description)
+            return Markup.words(locales.get(this.description));
         const node =
             this.replacement instanceof Refer
-                ? this.replacement.getNode([locale])
-                : this.getNewNode([locale]);
+                ? this.replacement.getNode(locales)
+                : this.getNewNode(locales);
         return concretize(
-            locale,
-            locale.ui.edit.replace,
-            node?.getLabel(locale)
+            locales,
+            locales.get((l) => l.ui.edit.replace),
+            node?.getLabel(locales)
         );
     }
 
diff --git a/src/edit/Revision.ts b/src/edit/Revision.ts
index ec481f627..313db9eb9 100644
--- a/src/edit/Revision.ts
+++ b/src/edit/Revision.ts
@@ -3,8 +3,8 @@ import type Node from '@nodes/Node';
 import type Context from '@nodes/Context';
 import type Source from '@nodes/Source';
 import type Spaces from '@parser/Spaces';
-import type Locale from '@locale/Locale';
 import type Markup from '../nodes/Markup';
+import type Locales from '../locale/Locales';
 
 export default abstract class Revision {
     readonly context: Context;
@@ -20,18 +20,18 @@ export default abstract class Revision {
     abstract isRemoval(): boolean;
 
     /** True if the revision is a completion */
-    abstract isCompletion(): boolean;
+    abstract isCompletion(locales: Locales): boolean;
 
     /** Create the edit to be processed by Editor. */
-    abstract getEdit(locales: Locale[]): Edit | undefined;
+    abstract getEdit(locales: Locales): Edit | undefined;
 
-    abstract getDescription(locale: Locale): Markup;
+    abstract getDescription(locales: Locales): Markup;
 
     /** Gets the node to be added, removed, inserted, etc. */
-    abstract getNewNode(locales: Locale[]): Node | undefined;
+    abstract getNewNode(locales: Locales): Node | undefined;
 
     /** Gets the added or removed node, and the revised node, which incorporates the new node. May be the same node. Used for the actual edit, but also for previews. */
-    abstract getEditedNode(locales: Locale[]): [Node, Node];
+    abstract getEditedNode(locales: Locales): [Node, Node];
 
     abstract equals(transform: Revision): boolean;
 
diff --git a/src/edit/SequenceProperties.ts b/src/edit/SequenceProperties.ts
index 3d4c4f208..e108bdd21 100644
--- a/src/edit/SequenceProperties.ts
+++ b/src/edit/SequenceProperties.ts
@@ -3,19 +3,19 @@ import MapLiteral from '../nodes/MapLiteral';
 import NumberLiteral from '../nodes/NumberLiteral';
 import Unit from '../nodes/Unit';
 import { createPoseLiteral } from '../output/Pose';
-import type Locale from '../locale/Locale';
 import OutputProperty from './OutputProperty';
 import OutputPropertyRange from './OutputPropertyRange';
 import { getDurationProperty, getStyleProperty } from './OutputProperties';
 import type Project from '../models/Project';
+import type Locales from '../locale/Locales';
 
 export default function getSequenceProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Sequence.poses,
+            locales.get((l) => l.output.Sequence.poses),
             'poses',
             true,
             false,
@@ -32,10 +32,10 @@ export default function getSequenceProperties(
                     ),
                 ])
         ),
-        getDurationProperty(locale),
-        getStyleProperty(locale),
+        getDurationProperty(locales),
+        getStyleProperty(locales),
         new OutputProperty(
-            locale.output.Sequence.count,
+            locales.get((l) => l.output.Sequence.count),
             new OutputPropertyRange(1, 5, 1, 'x', 0),
             false,
             false,
diff --git a/src/edit/ShapeProperties.ts b/src/edit/ShapeProperties.ts
index 9a568411d..0de324f54 100644
--- a/src/edit/ShapeProperties.ts
+++ b/src/edit/ShapeProperties.ts
@@ -1,4 +1,4 @@
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 import type Project from '../models/Project';
 import ListLiteral from '../nodes/ListLiteral';
 import { getOutputProperties } from './OutputProperties';
@@ -6,17 +6,17 @@ import OutputProperty from './OutputProperty';
 
 export default function getShapeProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Stage.content,
+            locales.get((l) => l.output.Stage.content),
             'content',
             true,
             false,
             (expr) => expr instanceof ListLiteral,
             () => ListLiteral.make([])
         ),
-        ...getOutputProperties(project, locale),
+        ...getOutputProperties(project, locales),
     ];
 }
diff --git a/src/edit/StageProperties.ts b/src/edit/StageProperties.ts
index d0d225603..5ae8b3640 100644
--- a/src/edit/StageProperties.ts
+++ b/src/edit/StageProperties.ts
@@ -1,4 +1,3 @@
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import ListLiteral from '../nodes/ListLiteral';
 import NumberLiteral from '../nodes/NumberLiteral';
@@ -6,14 +5,15 @@ import Unit from '../nodes/Unit';
 import OutputProperty from './OutputProperty';
 import OutputPropertyRange from './OutputPropertyRange';
 import { getTypeOutputProperties } from './OutputProperties';
+import type Locales from '../locale/Locales';
 
 export default function getStageProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Stage.content,
+            locales.get((l) => l.output.Stage.content),
             'content',
             true,
             false,
@@ -21,13 +21,13 @@ export default function getStageProperties(
             () => ListLiteral.make([])
         ),
         new OutputProperty(
-            locale.output.Stage.gravity,
+            locales.get((l) => l.output.Stage.gravity),
             new OutputPropertyRange(0, 20, 0.2, 'm/s^2', 1),
             true,
             false,
             (expr) => expr instanceof NumberLiteral,
             () => NumberLiteral.make('9.8', Unit.create(['m'], ['s', 's']))
         ),
-        ...getTypeOutputProperties(project, locale),
+        ...getTypeOutputProperties(project, locales),
     ];
 }
diff --git a/src/edit/getShapeProperties.ts b/src/edit/getShapeProperties.ts
index 0000a9d1e..41fcf4642 100644
--- a/src/edit/getShapeProperties.ts
+++ b/src/edit/getShapeProperties.ts
@@ -1,4 +1,4 @@
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 import type Project from '../models/Project';
 import ListLiteral from '../nodes/ListLiteral';
 import { getOutputProperties } from './OutputProperties';
@@ -6,17 +6,17 @@ import OutputProperty from './OutputProperty';
 
 export default function getShapeProperties(
     project: Project,
-    locale: Locale
+    locales: Locales
 ): OutputProperty[] {
     return [
         new OutputProperty(
-            locale.output.Shape.form,
+            locales.get((l) => l.output.Shape.form),
             'form',
             true,
             false,
             (expr) => expr instanceof ListLiteral,
             () => ListLiteral.make([])
         ),
-        ...getOutputProperties(project, locale),
+        ...getOutputProperties(project, locales),
     ];
 }
diff --git a/src/examples/examples.test.ts b/src/examples/examples.test.ts
index 949565584..90a7ac809 100644
--- a/src/examples/examples.test.ts
+++ b/src/examples/examples.test.ts
@@ -5,7 +5,7 @@ import { Locales } from '../db/Database';
 import { readdirSync, readFileSync } from 'fs';
 import path from 'path';
 import { parseSerializedProject } from './examples';
-import DefaultLocale from '../locale/DefaultLocale';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 const projects: SerializedProject[] = [];
 readdirSync(path.join('static', 'examples'), { withFileTypes: true }).forEach(
@@ -36,7 +36,7 @@ test.each([...projects])(
         ).flat()) {
             const conflictingNodes = conflict.getConflictingNodes();
             console.error(
-                conflictingNodes.primary.explanation(DefaultLocale, context)
+                conflictingNodes.primary.explanation(DefaultLocales, context)
             );
         }
         expect(project.getPrimaryConflicts()).toHaveLength(0);
diff --git a/src/input/Button.ts b/src/input/Button.ts
index b73041014..2c73cbf3c 100644
--- a/src/input/Button.ts
+++ b/src/input/Button.ts
@@ -10,8 +10,8 @@ import NoneType from '@nodes/NoneType';
 import BoolValue from '@values/BoolValue';
 import StreamType from '@nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import NoneLiteral from '../nodes/NoneLiteral';
+import type Locales from '../locale/Locales';
 
 export default class Button extends StreamValue<BoolValue, boolean> {
     on = false;
@@ -49,7 +49,7 @@ export default class Button extends StreamValue<BoolValue, boolean> {
     }
 }
 
-export function createButtonDefinition(locales: Locale[]) {
+export function createButtonDefinition(locales: Locales) {
     const DownBind = Bind.make(
         getDocLocales(locales, (locale) => locale.input.Button.down.doc),
         getNameLocales(locales, (locale) => locale.input.Button.down.names),
diff --git a/src/input/Camera.ts b/src/input/Camera.ts
index 2d7bd31e4..d2636d63a 100644
--- a/src/input/Camera.ts
+++ b/src/input/Camera.ts
@@ -17,10 +17,10 @@ import ListType from '../nodes/ListType';
 import type Expression from '../nodes/Expression';
 import ColorJS from 'colorjs.io';
 import StructureValue, { createStructure } from '../values/StructureValue';
-import type Locale from '../locale/Locale';
 import type StructureDefinition from '../nodes/StructureDefinition';
 import type Names from '../nodes/Names';
 import type Value from '../values/Value';
+import type Locales from '../locale/Locales';
 
 type CameraConfig = {
     stream: MediaStream;
@@ -299,7 +299,7 @@ const DEFAULT_WIDTH = 32;
 const DEFAULT_HEIGHT = 32;
 
 export function createCameraDefinition(
-    locales: Locale[],
+    locales: Locales,
     ColorType: StructureDefinition
 ) {
     const frameType = ListType.make(
diff --git a/src/input/Chat.ts b/src/input/Chat.ts
index a8d0f2919..09f365bc7 100644
--- a/src/input/Chat.ts
+++ b/src/input/Chat.ts
@@ -7,7 +7,7 @@ import TextType from '../nodes/TextType';
 import TextValue from '../values/TextValue';
 import StreamType from '../nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class Chat extends StreamValue<TextValue, string> {
     constructor(evaluator: Evaluator) {
@@ -40,7 +40,7 @@ export default class Chat extends StreamValue<TextValue, string> {
     }
 }
 
-export function createChatDefinition(locales: Locale[]) {
+export function createChatDefinition(locales: Locales) {
     return StreamDefinition.make(
         getDocLocales(locales, (locale) => locale.input.Chat.doc),
         getNameLocales(locales, (locale) => locale.input.Chat.names),
diff --git a/src/input/Choice.ts b/src/input/Choice.ts
index e0e9bbc75..2f6071258 100644
--- a/src/input/Choice.ts
+++ b/src/input/Choice.ts
@@ -7,7 +7,7 @@ import TextType from '../nodes/TextType';
 import TextValue from '../values/TextValue';
 import StreamType from '../nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 /** A series of selected output, chosen by mouse or keyboard, allowing for programs that work for both mouse and keyboard. */
 export default class Choice extends StreamValue<TextValue, string> {
@@ -48,7 +48,7 @@ export default class Choice extends StreamValue<TextValue, string> {
     }
 }
 
-export function createChoiceDefinition(locales: Locale[]) {
+export function createChoiceDefinition(locales: Locales) {
     return StreamDefinition.make(
         getDocLocales(locales, (locale) => locale.input.Choice.doc),
         getNameLocales(locales, (locale) => locale.input.Choice.names),
diff --git a/src/input/Collision.ts b/src/input/Collision.ts
index 7e6e686a5..600434c4a 100644
--- a/src/input/Collision.ts
+++ b/src/input/Collision.ts
@@ -8,7 +8,6 @@ import UnionType from '@nodes/UnionType';
 import NoneType from '@nodes/NoneType';
 import StreamType from '@nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import NoneLiteral from '../nodes/NoneLiteral';
 import type StructureValue from '../values/StructureValue';
 import TextType from '../nodes/TextType';
@@ -18,6 +17,7 @@ import NoneValue from '../values/NoneValue';
 import TextValue from '../values/TextValue';
 import { createReboundStructure } from '../output/Rebound';
 import { PX_PER_METER } from '../output/outputToCSS';
+import type Locales from '../locale/Locales';
 
 export type ReboundEvent =
     | {
@@ -126,7 +126,7 @@ export default class Collision extends StreamValue<
 }
 
 export function createCollisionDefinition(
-    locales: Locale[],
+    locales: Locales,
     ReboundType: StructureDefinition
 ) {
     const NameBind = Bind.make(
diff --git a/src/input/Key.ts b/src/input/Key.ts
index 5cbbba980..a40990fb0 100644
--- a/src/input/Key.ts
+++ b/src/input/Key.ts
@@ -13,7 +13,7 @@ import TextValue from '../values/TextValue';
 import BoolValue from '@values/BoolValue';
 import StreamType from '../nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class Key extends StreamValue<
     TextValue,
@@ -65,7 +65,7 @@ export default class Key extends StreamValue<
     }
 }
 
-export function createKeyDefinition(locales: Locale[]) {
+export function createKeyDefinition(locales: Locales) {
     const keyBind = Bind.make(
         getDocLocales(locales, (locale) => locale.input.Key.key.doc),
         getNameLocales(locales, (locale) => locale.input.Key.key.names),
diff --git a/src/input/Motion.ts b/src/input/Motion.ts
index 88dc005cc..f3569d267 100644
--- a/src/input/Motion.ts
+++ b/src/input/Motion.ts
@@ -9,7 +9,6 @@ import { getNameLocales } from '@locale/getNameLocales';
 import createStreamEvaluator from './createStreamEvaluator';
 import UnionType from '../nodes/UnionType';
 import NoneLiteral from '../nodes/NoneLiteral';
-import type Locale from '../locale/Locale';
 import type StructureDefinition from '../nodes/StructureDefinition';
 import type Value from '../values/Value';
 import type Context from '../nodes/Context';
@@ -19,6 +18,7 @@ import type { OutputBody } from '../output/Physics';
 import type Velocity from '../output/Velocity';
 import { toVelocity } from '../output/Velocity';
 import NoneValue from '../values/NoneValue';
+import type Locales from '../locale/Locales';
 
 export default class Motion extends TemporalStreamValue<Value, number> {
     private initialPlace: Place | undefined;
@@ -154,7 +154,7 @@ export default class Motion extends TemporalStreamValue<Value, number> {
 }
 
 export function createMotionDefinition(
-    locales: Locale[],
+    locales: Locales,
     placeType: StructureDefinition,
     velocityType: StructureDefinition
 ) {
diff --git a/src/input/Pitch.ts b/src/input/Pitch.ts
index 76ae02c58..89ac0b05a 100644
--- a/src/input/Pitch.ts
+++ b/src/input/Pitch.ts
@@ -10,9 +10,9 @@ import NoneType from '../nodes/NoneType';
 import NumberLiteral from '../nodes/NumberLiteral';
 import NumberValue from '@values/NumberValue';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import AudioStream from './AudioStream';
 import { PitchDetector } from 'pitchy';
+import type Locales from '../locale/Locales';
 
 /** We want more deail in the frequency domain and less in the amplitude domain, but we also want to minimize how much data we analyze. */
 const FFT_SIZE = 1024;
@@ -55,7 +55,7 @@ export default class Pitch extends AudioStream {
     }
 }
 
-export function createPitchDefinition(locales: Locale[]) {
+export function createPitchDefinition(locales: Locales) {
     const FrequencyBind = Bind.make(
         getDocLocales(locales, (locale) => locale.input.Pitch.frequency.doc),
         getNameLocales(locales, (locale) => locale.input.Pitch.frequency.names),
diff --git a/src/input/Placement.ts b/src/input/Placement.ts
index 75364b350..d83f7bf5d 100644
--- a/src/input/Placement.ts
+++ b/src/input/Placement.ts
@@ -8,7 +8,6 @@ import BooleanType from '../nodes/BooleanType';
 import BoolValue from '@values/BoolValue';
 import StreamType from '../nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import StructureValue from '../values/StructureValue';
 import NumberValue from '../values/NumberValue';
 import { createInputs, getFirstName } from '../locale/Locale';
@@ -24,6 +23,7 @@ import type Context from '../nodes/Context';
 import type Type from '../nodes/Type';
 import StructureType from '../nodes/StructureType';
 import type StructureDefinition from '../nodes/StructureDefinition';
+import type Locales from '../locale/Locales';
 
 type Direction = -1 | 0 | 1;
 type PlacementEvent = { x: Direction; y: Direction; z: Direction };
@@ -110,10 +110,10 @@ export default class Placement extends StreamValue<
 }
 
 export function createPlacementDefinition(
-    locales: Locale[],
+    locales: Locales,
     placeType: StructureDefinition
 ) {
-    const PlaceName = getFirstName(locales[0].output.Place.names);
+    const PlaceName = locales.get((l) => getFirstName(l.output.Place.names));
     const inputs = createInputs(locales, (l) => l.input.Placement.inputs, [
         [
             NameType.make(PlaceName),
diff --git a/src/input/Pointer.ts b/src/input/Pointer.ts
index 5ffc7afc3..690f9f783 100644
--- a/src/input/Pointer.ts
+++ b/src/input/Pointer.ts
@@ -11,9 +11,9 @@ import { getNameLocales } from '@locale/getNameLocales';
 import StructureType from '@nodes/StructureType';
 import StreamType from '@nodes/StreamType';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import type Type from '../nodes/Type';
 import type StructureDefinition from '../nodes/StructureDefinition';
+import type Locales from '../locale/Locales';
 
 function position(evaluator: Evaluator, x: number, y: number) {
     const PlaceType = evaluator.project.shares.output.Place;
@@ -74,7 +74,7 @@ export default class Pointer extends StreamValue<
 }
 
 export function createPointerDefinition(
-    locales: Locale[],
+    locales: Locales,
     PlaceType: StructureDefinition
 ) {
     return StreamDefinition.make(
diff --git a/src/input/Random.ts b/src/input/Random.ts
index 8115d0cb1..6dd1e33cb 100644
--- a/src/input/Random.ts
+++ b/src/input/Random.ts
@@ -3,13 +3,13 @@ import UnionType from '@nodes/UnionType';
 import NoneType from '@nodes/NoneType';
 import NoneLiteral from '@nodes/NoneLiteral';
 import NumberValue from '@values/NumberValue';
-import type Locale from '../locale/Locale';
 import { createBasisFunction } from '../basis/Basis';
 import type Evaluation from '../runtime/Evaluation';
 import type Expression from '../nodes/Expression';
 import NoneValue from '../values/NoneValue';
 import TypeVariables from '../nodes/TypeVariables';
 import TypeVariable from '../nodes/TypeVariable';
+import type Locales from '../locale/Locales';
 
 function getRandomInRange(
     random: number,
@@ -66,7 +66,7 @@ function toPrecisionRange(
     return pow ? Math.round(scaled * pow) / pow : scaled;
 }
 
-export function createRandomFunction(locales: Locale[]) {
+export function createRandomFunction(locales: Locales) {
     /** The type variable can be any number type, but nothing else */
     const NumberTypeVariable = TypeVariable.make(['Number'], NumberType.make());
 
diff --git a/src/input/Time.ts b/src/input/Time.ts
index 66ec50cea..1e7300bc7 100644
--- a/src/input/Time.ts
+++ b/src/input/Time.ts
@@ -13,7 +13,7 @@ import NumberValue from '@values/NumberValue';
 import { getDocLocales } from '../locale/getDocLocales';
 import { getNameLocales } from '../locale/getNameLocales';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 const DEFAULT_FREQUENCY = 33;
 
@@ -77,7 +77,7 @@ export default class Time extends TemporalStreamValue<NumberValue, number> {
     }
 }
 
-export function createTimeType(locale: Locale[]) {
+export function createTimeType(locale: Locales) {
     const TimeType = NumberType.make(Unit.reuse(['ms']));
 
     const FrequencyBind = Bind.make(
diff --git a/src/input/Volume.ts b/src/input/Volume.ts
index ac8f7e8e2..4a6b02dfd 100644
--- a/src/input/Volume.ts
+++ b/src/input/Volume.ts
@@ -10,8 +10,8 @@ import NoneType from '../nodes/NoneType';
 import NumberLiteral from '../nodes/NumberLiteral';
 import NumberValue from '@values/NumberValue';
 import createStreamEvaluator from './createStreamEvaluator';
-import type Locale from '../locale/Locale';
 import AudioStream, { DEFAULT_FREQUENCY } from './AudioStream';
+import type Locales from '../locale/Locales';
 
 const FFT_SIZE = 32;
 
@@ -58,7 +58,7 @@ export default class Volume extends AudioStream {
     }
 }
 
-export function createVolumeDefinition(locales: Locale[]) {
+export function createVolumeDefinition(locales: Locales) {
     const FrequencyBind = Bind.make(
         getDocLocales(locales, (locale) => locale.input.Volume.frequency.doc),
         getNameLocales(
diff --git a/src/input/Webpage.ts b/src/input/Webpage.ts
index 5be822199..c1b184b84 100644
--- a/src/input/Webpage.ts
+++ b/src/input/Webpage.ts
@@ -20,6 +20,7 @@ import UnionType from '../nodes/UnionType';
 import NoneType from '../nodes/NoneType';
 import MessageException from '../values/MessageException';
 import type ExceptionValue from '../values/ExceptionValue';
+import type Locales from '../locale/Locales';
 
 /**
  * Webpage stream values can be one of three things:
@@ -315,7 +316,7 @@ export default class Webpage extends StreamValue<
     }
 }
 
-export function createWebpageDefinition(locales: Locale[]) {
+export function createWebpageDefinition(locales: Locales) {
     const url = Bind.make(
         getDocLocales(locales, (locale) => locale.input.Webpage.url.doc),
         getNameLocales(locales, (locale) => locale.input.Webpage.url.names),
diff --git a/src/locale/DefaultLocale.ts b/src/locale/DefaultLocale.ts
index 957a7cf3c..53764b38d 100644
--- a/src/locale/DefaultLocale.ts
+++ b/src/locale/DefaultLocale.ts
@@ -1,6 +1,9 @@
 import en from '../locale/en-US.json';
 import type Locale from './Locale';
+import Locales from './Locales';
 
 const DefaultLocale = en as unknown as Locale;
 
+export const DefaultLocales = new Locales([DefaultLocale], DefaultLocale);
+
 export default DefaultLocale;
diff --git a/src/locale/Locale.ts b/src/locale/Locale.ts
index aa532c846..a7e73fd46 100644
--- a/src/locale/Locale.ts
+++ b/src/locale/Locale.ts
@@ -21,6 +21,7 @@ import { toTokens } from '../parser/toTokens';
 import { DOCS_SYMBOL } from '../parser/Symbols';
 import type { FlagDescriptions } from '../models/Moderation';
 import type { ButtonText, DialogText } from './UITexts';
+import type Locales from './Locales';
 
 /** A list of locales that are in progress but not supported yet. Only added when developing locally. */
 const EventuallySupportedLocales = ['zh-CN'];
@@ -180,7 +181,7 @@ export function getBestSupportedLocales(locales: string[]) {
 }
 
 export function createBind(
-    locales: Locale[],
+    locales: Locales,
     nameAndDoc: (locale: Locale) => NameAndDoc,
     type?: Type,
     value?: Expression
@@ -194,7 +195,7 @@ export function createBind(
 }
 
 export function createInputs(
-    locales: Locale[],
+    locales: Locales,
     fun: (locale: Locale) => NameAndDoc[],
     types: (Type | [Type, Expression])[]
 ) {
@@ -209,7 +210,7 @@ export function createInputs(
 }
 
 export function createFunction(
-    locales: Locale[],
+    locales: Locales,
     nameAndDoc: (locale: Locale) => NameAndDoc,
     typeVars: TypeVariables | undefined,
     inputs: Bind[],
diff --git a/src/locale/Locales.ts b/src/locale/Locales.ts
new file mode 100644
index 000000000..0ed92ac50
--- /dev/null
+++ b/src/locale/Locales.ts
@@ -0,0 +1,74 @@
+import type Names from '../nodes/Names';
+import { getLanguageDirection } from './LanguageCode';
+import type Locale from './Locale';
+
+/** Represents a sequence of preferred locales, and a set of utility functions for extracting information from them. */
+export default class Locales {
+    /** The list of preferred locales */
+    private readonly locales: Locale[];
+
+    /** The fallback locale when none of the preferred locales have suitable strings. */
+    private readonly fallback: Locale;
+
+    constructor(locales: Locale[], fallback: Locale) {
+        this.locales = locales.slice();
+        this.fallback = fallback;
+    }
+
+    /** Get the first preferred locale */
+    getLocale() {
+        return this.locales[0] ?? this.fallback;
+    }
+
+    /** Get all preferred locales */
+    getLocales() {
+        return this.locales;
+    }
+
+    /** Get the language codes for the preferred locales */
+    getLanguages() {
+        return this.locales.map((locale) => locale.language);
+    }
+
+    /** Get the writing direction for the most preferred locale. */
+    getDirection() {
+        return getLanguageDirection(this.getLocale().language);
+    }
+
+    /**
+     * Get the most preferred non-placeholder string given the accessor.
+     * If we resort the fallback, annotate the text with a signal that it's a placeholder.
+     * */
+    get<Kind>(accessor: (locale: Locale) => Kind): Kind {
+        const preferredResult = this.locales
+            .map((l) => accessor(l))
+            .find((text) => {
+                if (typeof text === 'string') return !text.startsWith('$?');
+                else if (
+                    Array.isArray(text) &&
+                    typeof text[0] === 'string' &&
+                    !text[0].startsWith('$?')
+                )
+                    return true;
+                else true;
+            });
+        if (preferredResult) return preferredResult;
+
+        const fallbackResult = accessor(this.fallback);
+
+        // Are we getting a string? Prepend a construction symbol.
+        return (
+            typeof fallbackResult === 'string'
+                ? `🚧${fallbackResult}`
+                : // Is it a list of strings? Prepend a construction symbol to the first string.
+                Array.isArray(fallbackResult) &&
+                  typeof fallbackResult[0] === 'string'
+                ? [`🚧${fallbackResult[0]}`, ...fallbackResult.slice(1)]
+                : fallbackResult
+        ) as Kind;
+    }
+
+    getName(names: Names, symbolic = true) {
+        return names.getPreferredNameString(this.locales, symbolic);
+    }
+}
diff --git a/src/locale/NodeRef.ts b/src/locale/NodeRef.ts
index 56e53d6a4..adf81e1b7 100644
--- a/src/locale/NodeRef.ts
+++ b/src/locale/NodeRef.ts
@@ -1,17 +1,17 @@
 import type Context from '@nodes/Context';
-import type Locale from './Locale';
 import type Node from '@nodes/Node';
 import concretize from './concretize';
+import type Locales from './Locales';
 
 export default class NodeRef {
     readonly node: Node;
-    readonly locale: Locale;
+    readonly locale: Locales;
     readonly context: Context;
     readonly description: string | undefined;
 
     constructor(
         node: Node,
-        locale: Locale,
+        locale: Locales,
         context: Context,
         description?: string
     ) {
diff --git a/src/locale/ValueRef.ts b/src/locale/ValueRef.ts
index dcbb3bded..292f10c14 100644
--- a/src/locale/ValueRef.ts
+++ b/src/locale/ValueRef.ts
@@ -1,15 +1,15 @@
 import type Context from '@nodes/Context';
-import type Locale from './Locale';
 import type Value from '@values/Value';
+import type Locales from './Locales';
 
 export default class ValueRef {
     readonly value: Value;
-    readonly locale: Locale;
+    readonly locales: Locales;
     readonly context: Context;
 
-    constructor(value: Value, locale: Locale, context: Context) {
+    constructor(value: Value, locales: Locales, context: Context) {
         this.value = value;
-        this.locale = locale;
+        this.locales = locales;
         this.context = context;
     }
 
diff --git a/src/locale/concretize.test.ts b/src/locale/concretize.test.ts
index 43f408640..dea205fa9 100644
--- a/src/locale/concretize.test.ts
+++ b/src/locale/concretize.test.ts
@@ -1,6 +1,6 @@
 import { test, expect } from 'vitest';
 import concretize, { type TemplateInput } from './concretize';
-import DefaultLocale from './DefaultLocale';
+import DefaultLocale, { DefaultLocales } from './DefaultLocale';
 
 test.each([
     ['', 'TBD', []],
@@ -25,7 +25,7 @@ test.each([
         [undefined, 1],
     ],
 ])('%s => %s', (template: string, result: string, inputs: TemplateInput[]) => {
-    expect(concretize(DefaultLocale, template, ...inputs).toText()).toBe(
+    expect(concretize(DefaultLocales, template, ...inputs).toText()).toBe(
         result
     );
 });
diff --git a/src/locale/concretize.ts b/src/locale/concretize.ts
index f724f5632..6664f3b84 100644
--- a/src/locale/concretize.ts
+++ b/src/locale/concretize.ts
@@ -1,6 +1,6 @@
 import Markup from '../nodes/Markup';
 import { toMarkup } from '../parser/toMarkup';
-import type Locale from './Locale';
+import type Locales from './Locales';
 import type NodeRef from './NodeRef';
 import type ValueRef from './ValueRef';
 
@@ -49,25 +49,30 @@ const TemplateToMarkupCache: Map<string, Markup> = new Map();
  *      "||"
  */
 export default function concretize(
-    locale: Locale,
+    /** The locales, in case we need to generate errors */
+    locales: Locales,
+    /** The string to localize */
     template: string,
+    /** The inputs to use to concretize */
     ...inputs: TemplateInput[]
 ): Markup {
     return (
-        concretizeOrUndefined(locale, template, ...inputs) ??
+        concretizeOrUndefined(locales, template, ...inputs) ??
         // Create a representation of a template that couldn't be concretized.
-        Markup.words(`${locale.ui.template.unparsable}: ${template}`)
+        Markup.words(
+            `${locales.get((l) => l.ui.template.unparsable)}: ${template}`
+        )
     );
 }
 
 export function concretizeOrUndefined(
-    locale: Locale,
+    locales: Locales,
     template: string,
     ...inputs: TemplateInput[]
 ): Markup | undefined {
     // Not written? Return the TBD string.
     if (template === '' || template === '$?')
-        return Markup.words(locale.ui.template.unwritten);
+        return Markup.words(locales.get((l) => l.ui.template.unwritten));
 
     // See if we've cached this template.
     let markup = TemplateToMarkupCache.get(template);
@@ -77,5 +82,5 @@ export function concretizeOrUndefined(
     }
 
     // Now concretize the markup with the given inputs.
-    return markup.concretize(locale, inputs);
+    return markup.concretize(locales, inputs);
 }
diff --git a/src/locale/getBind.ts b/src/locale/getBind.ts
index 313fbaac1..bf656c04d 100644
--- a/src/locale/getBind.ts
+++ b/src/locale/getBind.ts
@@ -9,16 +9,17 @@ import type Doc from '../nodes/Doc';
 import Name from '../nodes/Name';
 import Language from '../nodes/Language';
 import DefaultLocale from './DefaultLocale';
+import type Locales from './Locales';
 
 export function getBind(
-    locales: Locale[],
+    locales: Locales,
     select: (locale: Locale) => NameAndDoc,
     separator = ' '
 ): string {
     // Get the symbolic names from English (US), which we always include.
-    const enNames = locales.some(
-        (locale) => locale.language === 'en' && locale.region === 'US'
-    )
+    const enNames = locales
+        .getLocales()
+        .some((locale) => locale.language === 'en' && locale.region === 'US')
         ? undefined
         : select(DefaultLocale).names;
     const symbolic = enNames
@@ -28,7 +29,9 @@ export function getBind(
           )
         : undefined;
 
-    const names = locales.map((locale) => [locale, select(locale)] as const);
+    const names = locales
+        .getLocales()
+        .map((locale) => [locale, select(locale)] as const);
     return (
         new Docs(
             names.map(([locale, input]) =>
diff --git a/src/locale/getDocLocales.ts b/src/locale/getDocLocales.ts
index 8875ae54b..8404ba632 100644
--- a/src/locale/getDocLocales.ts
+++ b/src/locale/getDocLocales.ts
@@ -4,16 +4,19 @@ import type Locale from './Locale';
 import { localeToLanguage } from './localeToLanguage';
 import { parseLocaleDoc } from '@locale/Locale';
 import type Doc from '../nodes/Doc';
+import type Locales from './Locales';
 
 export function getDocLocales(
-    locales: Locale[],
+    locales: Locales,
     select: (locale: Locale) => DocText
 ): Docs {
     return new Docs(
-        locales.map((locale) =>
-            parseLocaleDoc(toDocString(select(locale))).withLanguage(
-                localeToLanguage(locale)
-            )
-        ) as [Doc, ...Doc[]]
+        locales
+            .getLocales()
+            .map((locale) =>
+                parseLocaleDoc(toDocString(select(locale))).withLanguage(
+                    localeToLanguage(locale)
+                )
+            ) as [Doc, ...Doc[]]
     );
 }
diff --git a/src/locale/getInputLocales.ts b/src/locale/getInputLocales.ts
index 2793717d3..2da2b7788 100644
--- a/src/locale/getInputLocales.ts
+++ b/src/locale/getInputLocales.ts
@@ -6,18 +6,19 @@ import { localeToLanguage } from './localeToLanguage';
 import { toDocString, type NameAndDoc, nameWithoutMentions } from './Locale';
 import type Locale from './Locale';
 import { parseLocaleDoc } from '@locale/Locale';
+import type Locales from './Locales';
 
 export function getInputLocales(
-    locales: Locale[],
+    locales: Locales,
     select: (translation: Locale) => NameAndDoc[]
 ): { docs: Docs; names: Names }[] {
     // Make a list of docs and names by bind index.
     const binds: { docs: Doc[]; names: Name[] }[] = [];
 
     // Convert each translation into names and docs for each input.
-    for (const [translation, inputs] of locales.map(
-        (translation) => [translation, select(translation)] as const
-    )) {
+    for (const [translation, inputs] of locales
+        .getLocales()
+        .map((locale) => [locale, select(locale)] as const)) {
         inputs.forEach((input, index) => {
             if (binds[index] === undefined)
                 binds[index] = { docs: [], names: [] };
diff --git a/src/locale/getNameLocales.ts b/src/locale/getNameLocales.ts
index c45856348..85e7381a7 100644
--- a/src/locale/getNameLocales.ts
+++ b/src/locale/getNameLocales.ts
@@ -4,13 +4,14 @@ import type { NameText } from './Locale';
 import type Locale from './Locale';
 import { localeToLanguage } from './localeToLanguage';
 import DefaultLocale from './DefaultLocale';
+import type Locales from './Locales';
 
 export function getNameLocales(
-    locales: Locale[],
+    locales: Locales,
     nameText: NameText | ((locale: Locale) => NameText)
 ): Names {
     // Construct names from the given locales.
-    let names = locales.reduce((names: Name[], locale) => {
+    let names = locales.getLocales().reduce((names: Name[], locale) => {
         const name = nameText instanceof Function ? nameText(locale) : nameText;
         return names.concat(
             (Array.isArray(name) ? name : [name]).map((n) =>
@@ -21,7 +22,8 @@ export function getNameLocales(
     // If the given locales don't include, the default locale, include the symbolic name from the default locale first.
     if (
         nameText instanceof Function &&
-        locales.find((locale) => locale === DefaultLocale) === undefined
+        locales.getLocales().find((locale) => locale === DefaultLocale) ===
+            undefined
     ) {
         const defaultNameTexts = nameText(DefaultLocale);
         const symbolic = (
diff --git a/src/models/Moderation.ts b/src/models/Moderation.ts
index 50542174b..4e71875be 100644
--- a/src/models/Moderation.ts
+++ b/src/models/Moderation.ts
@@ -1,6 +1,7 @@
 import type { User } from 'firebase/auth';
 import type { Locale, Template } from '../locale/Locale';
 import type Project from './Project';
+import type Locales from '../locale/Locales';
 
 /** Ways the platform can respond to a content moderation flag */
 export enum Remedy {
@@ -108,9 +109,9 @@ export function isAudience(user: User | null, project: Project): boolean {
 
 export function getFlagDescription(
     flag: string,
-    locale: Locale
+    locales: Locales
 ): string | undefined {
-    return locale.moderation.flags[flag as Flag];
+    return locales.get((l) => l.moderation.flags)[flag as Flag];
 }
 
 export async function isModerator(user: User) {
diff --git a/src/models/Project.ts b/src/models/Project.ts
index 67bbfcda8..c43392f28 100644
--- a/src/models/Project.ts
+++ b/src/models/Project.ts
@@ -27,6 +27,8 @@ import { toTokens } from '../parser/toTokens';
 import type LocalesDatabase from '../db/LocalesDatabase';
 import { moderatedFlags, type Moderation } from './Moderation';
 import { z } from 'zod';
+import DefaultLocale from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 const PathSchema = z.array(
     z.object({ type: z.string(), index: z.number().min(0) })
@@ -156,7 +158,9 @@ export default class Project {
         this.data = { ...data };
 
         // Get a Basis for the requested locales.
-        this.basis = Basis.getLocalizedBasis(this.data.locales);
+        this.basis = Basis.getLocalizedBasis(
+            new Locales(this.data.locales, DefaultLocale)
+        );
 
         // Initialize default shares
         this.shares = this.basis.shares;
@@ -905,7 +909,9 @@ export default class Project {
                             ?.caret ?? 0,
                 };
             }),
-            locales: this.getLocales().map((l) => toLocaleString(l)),
+            locales: this.getLocales()
+                .getLocales()
+                .map((l) => toLocaleString(l)),
             owner: this.data.owner,
             collaborators: this.data.collaborators,
             listed: this.isListed(),
diff --git a/src/nodes/AnyType.ts b/src/nodes/AnyType.ts
index 61037364f..467092923 100644
--- a/src/nodes/AnyType.ts
+++ b/src/nodes/AnyType.ts
@@ -1,8 +1,8 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import Type from './Type';
 import Glyphs from '../lore/Glyphs';
 import { PLACEHOLDER_SYMBOL } from '../parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export default class AnyType extends Type {
     constructor() {
@@ -25,8 +25,8 @@ export default class AnyType extends Type {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.AnyType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.AnyType);
     }
 
     toWordplay() {
diff --git a/src/nodes/BinaryEvaluate.ts b/src/nodes/BinaryEvaluate.ts
index 8019b41f2..0621ef94b 100644
--- a/src/nodes/BinaryEvaluate.ts
+++ b/src/nodes/BinaryEvaluate.ts
@@ -24,7 +24,6 @@ import NeverType from './NeverType';
 import type Definition from './Definition';
 import NumberType from './NumberType';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import type { Template } from '@locale/Locale';
 import StartEvaluation from '@runtime/StartEvaluation';
 import NodeRef from '@locale/NodeRef';
@@ -37,6 +36,7 @@ import concretize from '../locale/concretize';
 import Reference from './Reference';
 import ValueException from '../values/ValueException';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 export default class BinaryEvaluate extends Expression {
     readonly left: Expression;
@@ -65,10 +65,10 @@ export default class BinaryEvaluate extends Expression {
                 kind: node(Expression),
                 // The label comes from the type of left, or the default label from the translation.
                 label: (
-                    translation: Locale,
+                    locales: Locales,
                     _: Node,
                     context: Context
-                ): Template => this.left.getType(context).getLabel(translation),
+                ): Template => this.left.getType(context).getLabel(locales),
             },
             {
                 name: 'fun',
@@ -88,15 +88,14 @@ export default class BinaryEvaluate extends Expression {
                 kind: node(Expression),
                 // The name of the input from the function, or the translation default
                 label: (
-                    locale: Locale,
+                    locales: Locales,
                     _: Node,
                     context: Context
                 ): Template => {
                     const fun = this.getFunction(context);
-                    return (
-                        fun?.inputs[0].names.getPreferredNameString([locale]) ??
-                        locale.node.BinaryEvaluate.right
-                    );
+                    return fun
+                        ? locales.getName(fun.inputs[0].names)
+                        : locales.get((l) => l.node.BinaryEvaluate.right);
                 },
                 space: true,
                 indent: true,
@@ -372,8 +371,8 @@ export default class BinaryEvaluate extends Expression {
         }
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.BinaryEvaluate;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.BinaryEvaluate);
     }
 
     getStart() {
@@ -383,23 +382,23 @@ export default class BinaryEvaluate extends Expression {
         return this.fun;
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.BinaryEvaluate.start,
-            new NodeRef(this.left, locale, context)
+            locales,
+            locales.get((l) => l.node.BinaryEvaluate.start),
+            new NodeRef(this.left, locales, context)
         );
     }
 
     getFinishExplanations(
-        translation: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            translation,
-            translation.node.BinaryEvaluate.finish,
-            this.getValueIfDefined(translation, context, evaluator)
+            locales,
+            locales.get((l) => l.node.BinaryEvaluate.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
@@ -410,7 +409,7 @@ export default class BinaryEvaluate extends Expression {
         };
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locale: Locales, context: Context) {
         return [new NodeRef(this.fun, locale, context)];
     }
 }
diff --git a/src/nodes/Bind.ts b/src/nodes/Bind.ts
index df5d6bfcd..9a1dab82b 100644
--- a/src/nodes/Bind.ts
+++ b/src/nodes/Bind.ts
@@ -48,6 +48,7 @@ import type Node from './Node';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import Refer from '../edit/Refer';
 import UnknownType from './UnknownType';
+import type Locales from '../locale/Locales';
 
 export default class Bind extends Expression {
     readonly docs?: Docs;
@@ -192,12 +193,13 @@ export default class Bind extends Expression {
                 indent: true,
                 // The bind field should be whatever type is expected.
                 getType: (context: Context) => this.getExpectedType(context),
-                label: (locale: Locale, child: Node, context: Context) =>
-                    (child === this.value
-                        ? this.getCorrespondingBindDefinition(
-                              context
-                          )?.names.getPreferredNameString(locale)
-                        : undefined) ?? '_',
+                label: (locales: Locales, child: Node, context: Context) => {
+                    if (child === this.value) {
+                        const bind =
+                            this.getCorrespondingBindDefinition(context);
+                        return bind ? locales.getName(bind.names) : '_';
+                    } else return '_';
+                },
             },
         ];
     }
@@ -637,40 +639,40 @@ export default class Bind extends Expression {
         );
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Bind;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Bind);
     }
 
-    getStartExplanations(translation: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            translation,
-            translation.node.Bind.start,
+            locales,
+            locales.get((l) => l.node.Bind.start),
             this.value === undefined
                 ? undefined
-                : new NodeRef(this.value, translation, context)
+                : new NodeRef(this.value, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Bind.finish,
-            this.getValueIfDefined(locale, context, evaluator),
+            locales,
+            locales.get((l) => l.node.Bind.finish),
+            this.getValueIfDefined(locales, context, evaluator),
             new NodeRef(
                 this.names,
-                locale,
+                locales,
                 context,
-                this.names.getPreferredNameString(locale)
+                locales.getName(this.names)
             )
         );
     }
 
-    getDescriptionInputs(locale: Locale) {
-        return [this.names.getPreferredName(locale)?.getName()];
+    getDescriptionInputs(locales: Locales) {
+        return [locales.getName(this.names)];
     }
 
     getGlyphs() {
diff --git a/src/nodes/Block.ts b/src/nodes/Block.ts
index 21e883c93..a8a4ca689 100644
--- a/src/nodes/Block.ts
+++ b/src/nodes/Block.ts
@@ -23,12 +23,12 @@ import EvalOpenToken from './EvalOpenToken';
 import UnclosedDelimiter from '@conflicts/UnclosedDelimiter';
 import NoExpressionType from './NoExpressionType';
 import { none, type Grammar, type Replacement, node, list, any } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import concretize from '../locale/concretize';
 import Sym from './Sym';
 import Purpose from '../concepts/Purpose';
 import DefinitionExpression from './DefinitionExpression';
+import type Locales from '../locale/Locales';
 
 export enum BlockKind {
     Root = 'root',
@@ -101,8 +101,8 @@ export default class Block extends Expression {
             {
                 name: 'statements',
                 kind: list(true, node(Expression), node(Bind)),
-                label: (translation: Locale) =>
-                    translation.node.Block.statement,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Block.statement),
                 space: true,
                 indent: !this.isRoot(),
                 newline: this.isRoot() || this.isStructure(),
@@ -320,23 +320,26 @@ export default class Block extends Expression {
             : current;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Block;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Block);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Block.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Block.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Block.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Block.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/BooleanLiteral.ts b/src/nodes/BooleanLiteral.ts
index 55d28c6cf..4e4ad4cd9 100644
--- a/src/nodes/BooleanLiteral.ts
+++ b/src/nodes/BooleanLiteral.ts
@@ -8,12 +8,12 @@ import type Context from './Context';
 import type TypeSet from './TypeSet';
 import Sym from './Sym';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Literal from './Literal';
 import Glyphs from '../lore/Glyphs';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class BooleanLiteral extends Literal {
     readonly value: Token;
@@ -91,15 +91,15 @@ export default class BooleanLiteral extends Literal {
         return this.value;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.BooleanLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.BooleanLiteral);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.BooleanLiteral.start,
-            new NodeRef(this.value, locale, context, this.value.getText())
+            locales,
+            locales.get((l) => l.node.BooleanLiteral.start),
+            new NodeRef(this.value, locales, context, this.value.getText())
         );
     }
 
diff --git a/src/nodes/BooleanType.ts b/src/nodes/BooleanType.ts
index b3b5e4e5d..26422b62f 100644
--- a/src/nodes/BooleanType.ts
+++ b/src/nodes/BooleanType.ts
@@ -5,8 +5,8 @@ import BasisType from './BasisType';
 import type TypeSet from './TypeSet';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export default class BooleanType extends BasisType {
     readonly type: Token;
@@ -49,8 +49,8 @@ export default class BooleanType extends BasisType {
         return 'boolean';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.BooleanType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.BooleanType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Borrow.ts b/src/nodes/Borrow.ts
index c95fc2c17..8881fc50c 100644
--- a/src/nodes/Borrow.ts
+++ b/src/nodes/Borrow.ts
@@ -32,7 +32,6 @@ import {
     any,
     optional,
 } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import UnimplementedException from '@values/UnimplementedException';
 import NodeRef from '@locale/NodeRef';
@@ -42,6 +41,7 @@ import Glyphs from '../lore/Glyphs';
 import concretize from '../locale/concretize';
 import Purpose from '../concepts/Purpose';
 import Reference from './Reference';
+import type Locales from '../locale/Locales';
 
 export type SharedDefinition =
     | Source
@@ -82,18 +82,21 @@ export default class Borrow extends SimpleExpression {
                 name: 'source',
                 kind: any(node(Reference), none()),
                 space: true,
-                label: (locale: Locale) => locale.node.Borrow.source,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Borrow.source),
             },
             { name: 'dot', kind: optional(node(Sym.Access)) },
             {
                 name: 'name',
                 kind: optional(node(Reference)),
-                label: (locale: Locale) => locale.node.Borrow.name,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Borrow.name),
             },
             {
                 name: 'version',
                 kind: optional(node(Sym.Number)),
-                label: (locale: Locale) => locale.node.Borrow.version,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Borrow.version),
             },
         ];
     }
@@ -265,24 +268,24 @@ export default class Borrow extends SimpleExpression {
         return this.source ?? this.borrow;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Borrow;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Borrow);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Borrow.start,
+            locales,
+            locales.get((l) => l.node.Borrow.start),
             this.source
                 ? new NodeRef(
                       this.source,
-                      locale,
+                      locales,
                       context,
                       this.source.getName()
                   )
                 : undefined,
             this.name
-                ? new NodeRef(this.name, locale, context, this.name.getName())
+                ? new NodeRef(this.name, locales, context, this.name.getName())
                 : undefined
         );
     }
diff --git a/src/nodes/Branch.ts b/src/nodes/Branch.ts
index 976e7ae32..d30bf6520 100644
--- a/src/nodes/Branch.ts
+++ b/src/nodes/Branch.ts
@@ -1,5 +1,4 @@
 import Purpose from '../concepts/Purpose';
-import type Locale from '../locale/Locale';
 import type { TemplateInput } from '../locale/concretize';
 import type Glyph from '../lore/Glyph';
 import Glyphs from '../lore/Glyphs';
@@ -10,6 +9,7 @@ import Token from './Token';
 import Sym from './Sym';
 import Words from './Words';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 /**
  * To conditionally select a string, use ??, followed by an input that is either a boolean or possibly undefined value,
@@ -73,8 +73,8 @@ export default class Branch extends Content {
     getPurpose() {
         return Purpose.Document;
     }
-    getNodeLocale(locale: Locale) {
-        return locale.node.Branch;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Branch);
     }
 
     getGlyphs(): Glyph {
@@ -82,16 +82,16 @@ export default class Branch extends Content {
     }
 
     concretize(
-        locale: Locale,
+        locales: Locales,
         inputs: TemplateInput[],
         replacements: [Node, Node][]
     ): Words | undefined {
-        const value = this.mention.concretize(locale, inputs, replacements);
+        const value = this.mention.concretize(locales, inputs, replacements);
         const replacement =
             value === undefined ||
             (value instanceof Token && value.getText() === 'false')
-                ? this.no.concretize(locale, inputs, replacements)
-                : this.yes.concretize(locale, inputs, replacements);
+                ? this.no.concretize(locales, inputs, replacements)
+                : this.yes.concretize(locales, inputs, replacements);
 
         if (replacement) replacements.push([this, replacement]);
         return replacement;
diff --git a/src/nodes/Changed.ts b/src/nodes/Changed.ts
index 4988a918a..547543fe3 100644
--- a/src/nodes/Changed.ts
+++ b/src/nodes/Changed.ts
@@ -17,7 +17,6 @@ import { CHANGE_SYMBOL } from '@parser/Symbols';
 import Start from '@runtime/Start';
 import BoolValue from '@values/BoolValue';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import NodeRef from '@locale/NodeRef';
 import BooleanType from './BooleanType';
@@ -27,6 +26,7 @@ import type { BasisTypeName } from '../basis/BasisConstants';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
 import concretize from '../locale/concretize';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 export default class Changed extends SimpleExpression {
     readonly change: Token;
@@ -143,15 +143,15 @@ export default class Changed extends SimpleExpression {
         return this.change;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Changed;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Changed);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Changed.start,
-            new NodeRef(this.stream, locale, context)
+            locales,
+            locales.get((l) => l.node.Changed.start),
+            new NodeRef(this.stream, locales, context)
         );
     }
 
diff --git a/src/nodes/ConceptLink.ts b/src/nodes/ConceptLink.ts
index a28668576..3eb5e3219 100644
--- a/src/nodes/ConceptLink.ts
+++ b/src/nodes/ConceptLink.ts
@@ -7,6 +7,7 @@ import { LINK_SYMBOL } from '../parser/Symbols';
 import Symbol from './Sym';
 import Purpose from '../concepts/Purpose';
 import Content from './Content';
+import type Locales from '../locale/Locales';
 
 export default class ConceptLink extends Content {
     readonly concept: Token;
@@ -71,8 +72,8 @@ export default class ConceptLink extends Content {
         return [];
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ConceptLink;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ConceptLink);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Concretizer.ts b/src/nodes/Concretizer.ts
index 604c41d36..e619d85f6 100644
--- a/src/nodes/Concretizer.ts
+++ b/src/nodes/Concretizer.ts
@@ -1,9 +1,9 @@
-import type Locale from '@locale/Locale';
 import type { TemplateInput } from '../locale/concretize';
 import type Markup from './Markup';
+import type Locales from '../locale/Locales';
 
 type Concretizer = (
-    locale: Locale,
+    locales: Locales,
     template: string,
     ...inputs: TemplateInput[]
 ) => Markup;
diff --git a/src/nodes/Conditional.ts b/src/nodes/Conditional.ts
index 4664a48e2..fe8c4ebfc 100644
--- a/src/nodes/Conditional.ts
+++ b/src/nodes/Conditional.ts
@@ -18,13 +18,13 @@ import Finish from '@runtime/Finish';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '@values/Value';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import concretize from '../locale/concretize';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class Conditional extends Expression {
     readonly condition: Expression;
@@ -85,8 +85,8 @@ export default class Conditional extends Expression {
             {
                 name: 'condition',
                 kind: node(Expression),
-                label: (translation: Locale) =>
-                    translation.node.Conditional.condition,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Conditional.condition),
                 // Must be boolean typed
                 getType: () => BooleanType.make(),
             },
@@ -98,15 +98,16 @@ export default class Conditional extends Expression {
             {
                 name: 'yes',
                 kind: node(Expression),
-                label: (translation: Locale) =>
-                    translation.node.Conditional.yes,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Conditional.yes),
                 space: true,
                 indent: true,
             },
             {
                 name: 'no',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.node.Conditional.no,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Conditional.no),
                 space: true,
                 indent: true,
             },
@@ -212,27 +213,27 @@ export default class Conditional extends Expression {
         return this.question;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Conditional;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Conditional);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Conditional.start,
-            new NodeRef(this.condition, locale, context)
+            locales,
+            locales.get((l) => l.node.Conditional.start),
+            new NodeRef(this.condition, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Conditional.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Conditional.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Content.ts b/src/nodes/Content.ts
index b3eba5f0c..f60327c10 100644
--- a/src/nodes/Content.ts
+++ b/src/nodes/Content.ts
@@ -1,4 +1,4 @@
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 import type NodeRef from '../locale/NodeRef';
 import type ValueRef from '../locale/ValueRef';
 import type { TemplateInput } from '../locale/concretize';
@@ -12,7 +12,7 @@ export default abstract class Content extends Node {
     }
 
     abstract concretize(
-        locale: Locale,
+        locales: Locales,
         inputs: TemplateInput[],
         /** A mutable list of token replacements, to preserve preceding space after modifications */
         replacements: [Node, Node][]
diff --git a/src/nodes/ConversionDefinition.ts b/src/nodes/ConversionDefinition.ts
index 6627b7733..e193b3900 100644
--- a/src/nodes/ConversionDefinition.ts
+++ b/src/nodes/ConversionDefinition.ts
@@ -17,7 +17,6 @@ import type TypeSet from './TypeSet';
 import Docs from './Docs';
 import StartFinish from '@runtime/StartFinish';
 import { node, none, type Grammar, type Replacement, any } from './Node';
-import type Locale from '@locale/Locale';
 import InternalException from '@values/InternalException';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
@@ -29,6 +28,7 @@ import ExpressionPlaceholder from './ExpressionPlaceholder';
 import { toTokens } from '../parser/toTokens';
 import parseType from '../parser/paresType';
 import DefinitionExpression from './DefinitionExpression';
+import type Locales from '../locale/Locales';
 
 export default class ConversionDefinition extends DefinitionExpression {
     readonly docs: Docs | undefined;
@@ -190,14 +190,14 @@ export default class ConversionDefinition extends DefinitionExpression {
         return this.arrow;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ConversionDefinition;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ConversionDefinition);
     }
 
-    getStartExplanations(translation: Locale) {
+    getStartExplanations(locales: Locales) {
         return concretize(
-            translation,
-            translation.node.ConversionDefinition.start
+            locales,
+            locales.get((l) => l.node.ConversionDefinition.start)
         );
     }
 
@@ -205,10 +205,10 @@ export default class ConversionDefinition extends DefinitionExpression {
         return Glyphs.Conversion;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
-            new NodeRef(this.input, locale, context),
-            new NodeRef(this.output, locale, context),
+            new NodeRef(this.input, locales, context),
+            new NodeRef(this.output, locales, context),
         ];
     }
 }
diff --git a/src/nodes/ConversionType.ts b/src/nodes/ConversionType.ts
index 3ba28d4ac..fa2a8d0dd 100644
--- a/src/nodes/ConversionType.ts
+++ b/src/nodes/ConversionType.ts
@@ -6,8 +6,8 @@ import Sym from './Sym';
 import Type from './Type';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export default class ConversionType extends Type {
     readonly input: Type;
@@ -69,8 +69,8 @@ export default class ConversionType extends Type {
         return 'conversion';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ConversionType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ConversionType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Convert.ts b/src/nodes/Convert.ts
index 922064fc4..085071e32 100644
--- a/src/nodes/Convert.ts
+++ b/src/nodes/Convert.ts
@@ -20,7 +20,6 @@ import Names from './Names';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '@values/Value';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import StartConversion from '@runtime/StartConversion';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
@@ -35,6 +34,7 @@ import type Node from './Node';
 import Purpose from '../concepts/Purpose';
 import NameType from './NameType';
 import { getConcreteConversionTypeVariable } from './Generics';
+import type Locales from '../locale/Locales';
 
 export default class Convert extends Expression {
     readonly expression: Expression;
@@ -263,27 +263,27 @@ export default class Convert extends Expression {
         return this.convert;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Convert;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Convert);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Convert.start,
-            new NodeRef(this.expression, locale, context)
+            locales,
+            locales.get((l) => l.node.Convert.start),
+            new NodeRef(this.expression, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Convert.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Convert.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/CycleType.ts b/src/nodes/CycleType.ts
index 2e13ed397..e5ee1f59a 100644
--- a/src/nodes/CycleType.ts
+++ b/src/nodes/CycleType.ts
@@ -1,8 +1,8 @@
 import type Node from './Node';
 import UnknownType from './UnknownType';
 import type Expression from './Expression';
-import type Locale from '@locale/Locale';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class CycleType extends UnknownType<Expression> {
     readonly cycle: Node[];
@@ -12,7 +12,10 @@ export default class CycleType extends UnknownType<Expression> {
         this.cycle = cycle;
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.CycleType.description);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.CycleType.description)
+        );
     }
 }
diff --git a/src/nodes/Delete.test.ts b/src/nodes/Delete.test.ts
index 7df065ede..3dcd34438 100644
--- a/src/nodes/Delete.test.ts
+++ b/src/nodes/Delete.test.ts
@@ -3,6 +3,7 @@ import { testConflict } from '@conflicts/TestUtilities';
 import Delete from './Delete';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     [
@@ -27,6 +28,6 @@ test.each([
 test.each([['⎡a•# b•#⎦⎡1 2⎦⎡1 3⎦ ⎡- b = 3', '⎡ 1 2 ⎦']])(
     '%s = %s',
     (code: string, value: string) => {
-        expect(evaluateCode(code)?.toWordplay([])).toBe(value);
+        expect(evaluateCode(code)?.toWordplay(DefaultLocales)).toBe(value);
     }
 );
diff --git a/src/nodes/Delete.ts b/src/nodes/Delete.ts
index 7d430f90b..12064192f 100644
--- a/src/nodes/Delete.ts
+++ b/src/nodes/Delete.ts
@@ -15,7 +15,6 @@ import type Definition from './Definition';
 import type TypeSet from './TypeSet';
 import type Evaluator from '@runtime/Evaluator';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
@@ -31,6 +30,7 @@ import BoolValue from '@values/BoolValue';
 import { getIteration, getIterationResult } from '../basis/Iteration';
 import { DELETE_SYMBOL } from '../parser/Symbols';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 type DeleteState = { index: number; list: StructureValue[]; table: TableValue };
 
@@ -58,13 +58,13 @@ export default class Delete extends Expression {
             {
                 name: 'table',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.table,
+                label: (locales: Locales) => locales.get((l) => l.term.table),
             },
             { name: 'del', kind: node(Sym.Delete), space: true },
             {
                 name: 'query',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.query,
+                label: (locales: Locales) => locales.get((l) => l.term.query),
                 // Must be a boolean
                 getType: () => BooleanType.make(),
                 space: true,
@@ -238,27 +238,27 @@ export default class Delete extends Expression {
         return this.del;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Delete;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Delete);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Delete.start,
-            new NodeRef(this.table, locale, context)
+            locales,
+            locales.get((l) => l.node.Delete.start),
+            new NodeRef(this.table, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Delete.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Delete.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Dimension.ts b/src/nodes/Dimension.ts
index 1b0ff0216..7d6fd29f0 100644
--- a/src/nodes/Dimension.ts
+++ b/src/nodes/Dimension.ts
@@ -5,11 +5,11 @@ import { EXPONENT_SYMBOL } from '@parser/Symbols';
 import { PRODUCT_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import NameToken from './NameToken';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import Markup from './Markup';
 import type Type from './Type';
+import type Locales from '../locale/Locales';
 
 export default class Dimension extends Node {
     readonly product: Token | undefined;
@@ -136,11 +136,11 @@ export default class Dimension extends Node {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Dimension;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Dimension);
     }
 
-    getDescription(_: Concretizer, locale: Locale) {
+    getDescription(_: Concretizer, locales: Locales) {
         const dim = this.getName();
 
         return Markup.words(
@@ -174,7 +174,7 @@ export default class Dimension extends Node {
                       oz: 'ounces',
                       lb: 'pounds',
                       pt: 'font size',
-                  }[dim] ?? locale.node.Dimension.description
+                  }[dim] ?? locales.get((l) => l.node.Dimension.description)
         );
     }
 
diff --git a/src/nodes/Doc.ts b/src/nodes/Doc.ts
index bc02f20cd..6937f1ed0 100644
--- a/src/nodes/Doc.ts
+++ b/src/nodes/Doc.ts
@@ -2,7 +2,6 @@ import Language from './Language';
 import { node, optional } from './Node';
 import type { Grammar, Replacement } from './Node';
 import Token from './Token';
-import type Locale from '@locale/Locale';
 import { DOCS_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import type Paragraph from './Paragraph';
@@ -11,6 +10,7 @@ import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import Markup from './Markup';
 import { LanguageTagged } from './LanguageTagged';
+import type Locales from '../locale/Locales';
 
 export default class Doc extends LanguageTagged {
     readonly open: Token;
@@ -87,8 +87,8 @@ export default class Doc extends LanguageTagged {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Doc;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Doc);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Docs.ts b/src/nodes/Docs.ts
index 0de1765d3..c927df449 100644
--- a/src/nodes/Docs.ts
+++ b/src/nodes/Docs.ts
@@ -1,10 +1,10 @@
 import type { Grammar, Replacement } from './Node';
 import Doc from './Doc';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import Node, { list, node } from './Node';
 import { getPreferred } from './LanguageTagged';
+import type Locales from '../locale/Locales';
 
 export default class Docs extends Node {
     readonly docs: Doc[];
@@ -43,15 +43,15 @@ export default class Docs extends Node {
         return this.docs;
     }
 
-    getPreferredLocale(preferred: Locale | Locale[]): Doc {
+    getPreferredLocale(preferred: Locales): Doc {
         // Build the list of preferred languages
-        const locales = Array.isArray(preferred) ? preferred : [preferred];
+        const locales = preferred.getLocales();
 
         return getPreferred(locales, this.docs);
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.Docs;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Docs);
     }
 
     getGlyphs() {
diff --git a/src/nodes/DocumentedExpression.ts b/src/nodes/DocumentedExpression.ts
index db9d3b9e1..0e89fe16f 100644
--- a/src/nodes/DocumentedExpression.ts
+++ b/src/nodes/DocumentedExpression.ts
@@ -8,11 +8,11 @@ import type TypeSet from './TypeSet';
 import type Evaluator from '@runtime/Evaluator';
 import Docs from './Docs';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import Glyphs from '../lore/Glyphs';
 import concretize from '../locale/concretize';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 export default class DocumentedExpression extends SimpleExpression {
     readonly docs: Docs;
@@ -85,12 +85,15 @@ export default class DocumentedExpression extends SimpleExpression {
         return this.expression;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.DocumentedExpression;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.DocumentedExpression);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.DocumentedExpression.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.DocumentedExpression.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/Evaluate.ts b/src/nodes/Evaluate.ts
index 432fad255..d1ced4d75 100644
--- a/src/nodes/Evaluate.ts
+++ b/src/nodes/Evaluate.ts
@@ -39,7 +39,6 @@ import UnexpectedTypeInput from '@conflicts/UnexpectedTypeInput';
 import PropertyReference from './PropertyReference';
 import NeverType from './NeverType';
 import { node, type Grammar, type Replacement, any, none, list } from './Node';
-import type Locale from '@locale/Locale';
 import type Node from './Node';
 import StartEvaluation from '@runtime/StartEvaluation';
 import UnimplementedException from '@values/UnimplementedException';
@@ -58,6 +57,7 @@ import TypeException from '../values/TypeException';
 import TypeVariable from './TypeVariable';
 import NameType from './NameType';
 import { NonFunctionType } from './NonFunctionType';
+import type Locales from '../locale/Locales';
 
 type Mapping = {
     expected: Bind;
@@ -204,20 +204,20 @@ export default class Evaluate extends Expression {
                         ),
                         new AnyType()
                     ),
-                label: (translation: Locale) =>
-                    translation.node.Evaluate.function,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Evaluate.function),
             },
             { name: 'types', kind: any(node(TypeInputs), none()) },
             { name: 'open', kind: node(Sym.EvalOpen) },
             {
                 name: 'inputs',
                 kind: list(true, node(Expression)),
-                label: (locale: Locale, child: Node, context: Context) => {
+                label: (locales: Locales, child: Node, context: Context) => {
                     // Get the function called
                     const fun = this.getFunction(context);
                     // Didn't find it? Default label.
                     if (fun === undefined || !(child instanceof Expression))
-                        return locale.node.Evaluate.input;
+                        return locales.get((l) => l.node.Evaluate.input);
                     // Get the mapping from inputs to binds
                     const mapping = this.getInputMapping(context);
                     // Find the bind to which this child was mapped and get its translation of this language.
@@ -229,8 +229,8 @@ export default class Evaluate extends Expression {
                                     m.given.includes(child)))
                     );
                     return bind === undefined
-                        ? locale.node.Evaluate.input
-                        : bind.expected.names.getPreferredNameString(locale);
+                        ? locales.get((l) => l.node.Evaluate.input)
+                        : locales.getName(bind.expected.names);
                 },
                 space: true,
                 indent: true,
@@ -921,34 +921,33 @@ export default class Evaluate extends Expression {
         return this.close ?? this.fun;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Evaluate;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Evaluate);
     }
 
-    getStartExplanations(locale: Locale) {
+    getStartExplanations(locales: Locales) {
         return concretize(
-            locale,
-            locale.node.Evaluate.start,
+            locales,
+            locales.get((l) => l.node.Evaluate.start),
             this.inputs.length > 0
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Evaluate.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Evaluate.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
-        return [
-            this.getFunction(context)?.names.getPreferredNameString(locale),
-        ];
+    getDescriptionInputs(locales: Locales, context: Context) {
+        const names = this.getFunction(context)?.names;
+        return [names ? locales.getName(names) : undefined];
     }
 
     getGlyphs() {
diff --git a/src/nodes/Example.ts b/src/nodes/Example.ts
index d076327b0..914330f3a 100644
--- a/src/nodes/Example.ts
+++ b/src/nodes/Example.ts
@@ -1,5 +1,4 @@
 import type Conflict from '@conflicts/Conflict';
-import type Locale from '@locale/Locale';
 import { node, type Replacement, type Grammar } from './Node';
 import Program from './Program';
 import Token from './Token';
@@ -8,6 +7,7 @@ import Purpose from '../concepts/Purpose';
 import Sym from './Sym';
 import { CODE_SYMBOL } from '../parser/Symbols';
 import Content from './Content';
+import type Locales from '../locale/Locales';
 
 export default class Example extends Content {
     readonly open: Token;
@@ -58,8 +58,8 @@ export default class Example extends Content {
         return Purpose.Document;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Example;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Example);
     }
 
     getGlyphs() {
diff --git a/src/nodes/ExceptionType.ts b/src/nodes/ExceptionType.ts
index a67b5e4f1..7feaa386e 100644
--- a/src/nodes/ExceptionType.ts
+++ b/src/nodes/ExceptionType.ts
@@ -1,10 +1,10 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
 import type ExceptionValue from '@values/ExceptionValue';
-import type Locale from '@locale/Locale';
 import Type from './Type';
 import type TypeSet from './TypeSet';
 import { EXCEPTION_SYMBOL } from '../parser/Symbols';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export default class ExceptionType extends Type {
     readonly exception: ExceptionValue;
@@ -49,8 +49,8 @@ export default class ExceptionType extends Type {
         return new ExceptionType(this.exception) as this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ExceptionType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ExceptionType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Expression.ts b/src/nodes/Expression.ts
index 6570bb09c..73ebffa2e 100644
--- a/src/nodes/Expression.ts
+++ b/src/nodes/Expression.ts
@@ -6,9 +6,9 @@ import type Type from './Type';
 import type Step from '@runtime/Step';
 import type Bind from './Bind';
 import type TypeSet from './TypeSet';
-import type Locale from '@locale/Locale';
 import ValueRef from '@locale/ValueRef';
 import type Markup from './Markup';
+import type Locales from '../locale/Locales';
 
 export enum ExpressionKind {
     Simple = 'simple',
@@ -87,25 +87,25 @@ export default abstract class Expression extends Node {
     abstract getFinish(): Node;
 
     abstract getStartExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ): Markup;
 
     abstract getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ): Markup;
 
     /** Utility function for getting an optional result   */
     getValueIfDefined(
-        translation: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         const value = evaluator.peekValue();
-        return value ? new ValueRef(value, translation, context) : undefined;
+        return value ? new ValueRef(value, locales, context) : undefined;
     }
 
     /** Get the kind of node, for highlighting or other purposes */
diff --git a/src/nodes/ExpressionPlaceholder.ts b/src/nodes/ExpressionPlaceholder.ts
index 7634c10da..5afbb04d7 100644
--- a/src/nodes/ExpressionPlaceholder.ts
+++ b/src/nodes/ExpressionPlaceholder.ts
@@ -16,7 +16,6 @@ import PlaceholderToken from './PlaceholderToken';
 import UnimplementedType from './UnimplementedType';
 import TypeToken from './TypeToken';
 import { node, type Grammar, type Replacement, none, any } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import type { Template } from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
@@ -29,6 +28,7 @@ import BinaryEvaluate from './BinaryEvaluate';
 import FunctionDefinition from './FunctionDefinition';
 import Sym from './Sym';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 export default class ExpressionPlaceholder extends SimpleExpression {
     readonly placeholder: Token | undefined;
@@ -69,7 +69,7 @@ export default class ExpressionPlaceholder extends SimpleExpression {
                 name: 'placeholder',
                 kind: node(Sym.Placeholder),
                 label: (
-                    translation: Locale,
+                    locales: Locales,
                     _: Node,
                     context: Context,
                     root: Root
@@ -79,10 +79,13 @@ export default class ExpressionPlaceholder extends SimpleExpression {
                     return (
                         parent?.getChildPlaceholderLabel(
                             this,
-                            translation,
+                            locales,
                             context,
                             root
-                        ) ?? translation.node.ExpressionPlaceholder.placeholder
+                        ) ??
+                        locales.get(
+                            (l) => l.node.ExpressionPlaceholder.placeholder
+                        )
                     );
                 },
             },
@@ -182,18 +185,21 @@ export default class ExpressionPlaceholder extends SimpleExpression {
         return this.placeholder ?? this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ExpressionPlaceholder;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ExpressionPlaceholder);
     }
 
-    getDescriptionInput(locale: Locale, context: Context) {
+    getDescriptionInput(locales: Locales, context: Context) {
         return [
-            this.type ? new NodeRef(this.type, locale, context) : undefined,
+            this.type ? new NodeRef(this.type, locales, context) : undefined,
         ];
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.ExpressionPlaceholder.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.ExpressionPlaceholder.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/FormatedLiteral.test.ts b/src/nodes/FormatedLiteral.test.ts
index 270c5b467..0049cee5a 100644
--- a/src/nodes/FormatedLiteral.test.ts
+++ b/src/nodes/FormatedLiteral.test.ts
@@ -1,5 +1,6 @@
 import { test, expect } from 'vitest';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     // Test JavaScript number translation.
@@ -9,5 +10,5 @@ test.each([
     ['`hello\\1\\world`/en', 'hello1world'],
     ["`hello\\'no'\\world`/en", 'hellonoworld'],
 ])('%s -> %s', (code, value) => {
-    expect(evaluateCode(code)?.toWordplay([])).toBe(value);
+    expect(evaluateCode(code)?.toWordplay(DefaultLocales)).toBe(value);
 });
diff --git a/src/nodes/FormattdLiteral.test.ts b/src/nodes/FormattdLiteral.test.ts
index b22b7e839..c7f7f8b9f 100644
--- a/src/nodes/FormattdLiteral.test.ts
+++ b/src/nodes/FormattdLiteral.test.ts
@@ -3,6 +3,7 @@ import evaluateCode from '../runtime/evaluate';
 import type Locale from '../locale/Locale';
 import { readFileSync } from 'fs';
 import DefaultLocale from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 /** Load a few locales for testing. */
 const en = DefaultLocale;
@@ -22,6 +23,9 @@ test.each([
     ['`hola`/es`hello`/en', 'hola', [es, en]],
     ['`hola`/es`hello`/en', 'hello', [en]],
 ])('%s -> %s', async (code, value, locales: Locale[]) => {
-    locales = locales.length === 0 ? [en] : locales;
-    expect(evaluateCode(code, [], locales)?.toWordplay(locales)).toBe(value);
+    const loc = new Locales(
+        locales.length === 0 ? [en] : locales,
+        DefaultLocale
+    );
+    expect(evaluateCode(code, [], loc)?.toWordplay(loc)).toBe(value);
 });
diff --git a/src/nodes/FormattedLiteral.ts b/src/nodes/FormattedLiteral.ts
index 4c4be27b8..011adc2ab 100644
--- a/src/nodes/FormattedLiteral.ts
+++ b/src/nodes/FormattedLiteral.ts
@@ -22,6 +22,7 @@ import type Evaluator from '@runtime/Evaluator';
 import Token from './Token';
 import Sym from './Sym';
 import TextValue from '../values/TextValue';
+import type Locales from '../locale/Locales';
 
 export default class FormattedLiteral extends Literal {
     readonly texts: FormattedTranslation[];
@@ -119,16 +120,16 @@ export default class FormattedLiteral extends Literal {
         return getPreferred(locales, this.texts);
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.FormattedLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.FormattedLiteral);
     }
 
     getGlyphs() {
         return Glyphs.Formatted;
     }
 
-    getValue(locales: Locale[]): Value {
-        const preferred = this.getPreferredText(locales);
+    getValue(locales: Locales): Value {
+        const preferred = this.getPreferredText(locales.getLocales());
         return new MarkupValue(this, preferred.markup);
     }
 
@@ -148,7 +149,10 @@ export default class FormattedLiteral extends Literal {
         throw this.texts[this.texts.length - 1];
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.FormattedLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.FormattedLiteral.start)
+        );
     }
 }
diff --git a/src/nodes/FormattedTranslation.ts b/src/nodes/FormattedTranslation.ts
index 9912a3eec..3e0161e50 100644
--- a/src/nodes/FormattedTranslation.ts
+++ b/src/nodes/FormattedTranslation.ts
@@ -2,7 +2,6 @@ import Language from './Language';
 import { node, optional } from './Node';
 import type { Grammar, Replacement } from './Node';
 import Token from './Token';
-import type Locale from '@locale/Locale';
 import { FORMATTED_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import type Paragraph from './Paragraph';
@@ -12,6 +11,7 @@ import Purpose from '../concepts/Purpose';
 import Markup from './Markup';
 import { LanguageTagged } from './LanguageTagged';
 import Example from './Example';
+import type Locales from '../locale/Locales';
 
 export default class FormattedTranslation extends LanguageTagged {
     readonly open: Token;
@@ -101,8 +101,8 @@ export default class FormattedTranslation extends LanguageTagged {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.FormattedTranslation;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.FormattedTranslation);
     }
 
     getGlyphs() {
diff --git a/src/nodes/FormattedType.ts b/src/nodes/FormattedType.ts
index eadc0da36..b97983a07 100644
--- a/src/nodes/FormattedType.ts
+++ b/src/nodes/FormattedType.ts
@@ -1,4 +1,3 @@
-import type Locale from '../locale/Locale';
 import type { NodeText, DescriptiveNodeText } from '../locale/NodeTexts';
 import type Glyph from '../lore/Glyph';
 import type { BasisTypeName } from '../basis/BasisConstants';
@@ -9,6 +8,7 @@ import Sym from './Sym';
 import Token from './Token';
 import Glyphs from '../lore/Glyphs';
 import { DOCS_SYMBOL } from '../parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export default class FormattedType extends BasisType {
     readonly tick: Token;
@@ -49,7 +49,7 @@ export default class FormattedType extends BasisType {
         return Glyphs.Formatted;
     }
 
-    getNodeLocale(locale: Locale): NodeText | DescriptiveNodeText {
-        return locale.node.FormattedType;
+    getNodeLocale(locales: Locales): NodeText | DescriptiveNodeText {
+        return locales.get((l) => l.node.FormattedType);
     }
 }
diff --git a/src/nodes/FunctionDefinition.ts b/src/nodes/FunctionDefinition.ts
index f8a2461c0..f6a73d3a2 100644
--- a/src/nodes/FunctionDefinition.ts
+++ b/src/nodes/FunctionDefinition.ts
@@ -42,6 +42,7 @@ import PropertyReference from './PropertyReference';
 import Reference from './Reference';
 import Purpose from '../concepts/Purpose';
 import DefinitionExpression from './DefinitionExpression';
+import type Locales from '../locale/Locales';
 
 export default class FunctionDefinition extends DefinitionExpression {
     readonly docs?: Docs;
@@ -125,7 +126,7 @@ export default class FunctionDefinition extends DefinitionExpression {
 
     /** Create an expression that evaluates this function with typed placeholders for its inputs. */
     getEvaluateTemplate(
-        nameOrLocales: Locale[] | string,
+        nameOrLocales: Locales | string,
         context: Context,
         structureType: Expression | Type | undefined
     ) {
@@ -139,7 +140,7 @@ export default class FunctionDefinition extends DefinitionExpression {
         const reference = Reference.make(
             typeof nameOrLocales === 'string'
                 ? nameOrLocales
-                : this.names.getPreferredNameString(nameOrLocales),
+                : nameOrLocales.getName(this.names),
             this
         );
         return this.isOperator() && this.inputs.length === 0
@@ -431,16 +432,19 @@ export default class FunctionDefinition extends DefinitionExpression {
         return current;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.FunctionDefinition;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.FunctionDefinition);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.FunctionDefinition.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.FunctionDefinition.start)
+        );
     }
 
-    getDescriptionInputs(locale: Locale) {
-        return [this.names.getPreferredNameString([locale])];
+    getDescriptionInputs(locales: Locales) {
+        return [locales.getName(this.names)];
     }
 
     getGlyphs() {
diff --git a/src/nodes/FunctionType.ts b/src/nodes/FunctionType.ts
index 153e88fa8..c0e64c884 100644
--- a/src/nodes/FunctionType.ts
+++ b/src/nodes/FunctionType.ts
@@ -17,7 +17,6 @@ import {
     optional as optional,
     list,
 } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import FunctionDefinition from './FunctionDefinition';
 import Names from './Names';
@@ -25,6 +24,7 @@ import ExpressionPlaceholder from './ExpressionPlaceholder';
 import TypePlaceholder from './TypePlaceholder';
 import type { TemplateInput } from '../locale/concretize';
 import NodeRef from '../locale/NodeRef';
+import type Locales from '../locale/Locales';
 
 export default class FunctionType extends Type {
     readonly fun: Token;
@@ -180,12 +180,12 @@ export default class FunctionType extends Type {
         return getEvaluationInputConflicts(this.inputs);
     }
 
-    getDescriptionInputs(locale: Locale, context: Context): TemplateInput[] {
-        return [this.inputs.length, new NodeRef(this.output, locale, context)];
+    getDescriptionInputs(locales: Locales, context: Context): TemplateInput[] {
+        return [this.inputs.length, new NodeRef(this.output, locales, context)];
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.FunctionType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.FunctionType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Initial.ts b/src/nodes/Initial.ts
index b20e7bc9d..d76fd75a5 100644
--- a/src/nodes/Initial.ts
+++ b/src/nodes/Initial.ts
@@ -11,7 +11,6 @@ import Sym from './Sym';
 import { INITIAL_SYMBOL } from '@parser/Symbols';
 import BoolValue from '@values/BoolValue';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import BooleanType from './BooleanType';
 import StartFinish from '@runtime/StartFinish';
@@ -20,6 +19,7 @@ import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Initial extends SimpleExpression {
     readonly diamond: Token;
@@ -97,12 +97,15 @@ export default class Initial extends SimpleExpression {
         return this.diamond;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Initial;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Initial);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Initial.name);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Initial.name)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/Insert.test.ts b/src/nodes/Insert.test.ts
index 0a249ff16..fedbe6bd8 100644
--- a/src/nodes/Insert.test.ts
+++ b/src/nodes/Insert.test.ts
@@ -6,6 +6,7 @@ import MissingCell from '@conflicts/MissingCell';
 import InvalidRow from '@conflicts/InvalidRow';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     [
@@ -43,5 +44,5 @@ test.each([
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡+ 2 3⎦', '⎡ 1 2 ⎦\n⎡ 2 3 ⎦'],
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡+ 2 3⎦ ⎡+ 3 4⎦', '⎡ 1 2 ⎦\n⎡ 2 3 ⎦\n⎡ 3 4 ⎦'],
 ])('%s = %s', (code: string, value: string) => {
-    expect(evaluateCode(code)?.toWordplay([])).toBe(value);
+    expect(evaluateCode(code)?.toWordplay(DefaultLocales)).toBe(value);
 });
diff --git a/src/nodes/Insert.ts b/src/nodes/Insert.ts
index ec9c3aabf..f12b5c276 100644
--- a/src/nodes/Insert.ts
+++ b/src/nodes/Insert.ts
@@ -18,7 +18,6 @@ import Halt from '@runtime/Halt';
 import ExceptionValue from '@values/ExceptionValue';
 import TypeException from '@values/TypeException';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import UnimplementedException from '@values/UnimplementedException';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
@@ -34,6 +33,7 @@ import Token from './Token';
 import { INSERT_SYMBOL, TABLE_CLOSE_SYMBOL } from '../parser/Symbols';
 import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 export default class Insert extends Expression {
     readonly table: Expression;
@@ -64,12 +64,12 @@ export default class Insert extends Expression {
             {
                 name: 'table',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.table,
+                label: (locales: Locales) => locales.get((l) => l.term.table),
             },
             {
                 name: 'row',
                 kind: node(Row),
-                label: (translation: Locale) => translation.term.row,
+                label: (locales: Locales) => locales.get((l) => l.term.row),
                 space: true,
             },
         ];
@@ -308,27 +308,27 @@ export default class Insert extends Expression {
         return this.row.close ?? this.row.open;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Insert;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Insert);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Insert.start,
-            new NodeRef(this.table, locale, context)
+            locales,
+            locales.get((l) => l.node.Insert.start),
+            new NodeRef(this.table, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Insert.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Insert.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Is.ts b/src/nodes/Is.ts
index 097190a0e..1e78f6891 100644
--- a/src/nodes/Is.ts
+++ b/src/nodes/Is.ts
@@ -17,7 +17,6 @@ import UnionType from './UnionType';
 import TypeSet from './TypeSet';
 import Start from '@runtime/Start';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import Sym from './Sym';
@@ -27,6 +26,7 @@ import concretize from '../locale/concretize';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import TypePlaceholder from './TypePlaceholder';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class Is extends Expression {
     readonly expression: Expression;
@@ -164,29 +164,29 @@ export default class Is extends Expression {
         return this.type;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Is;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Is);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Is.start,
-            new NodeRef(this.expression, locale, context)
+            locales,
+            locales.get((l) => l.node.Is.start),
+            new NodeRef(this.expression, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         const result = evaluator.peekValue();
         return concretize(
-            locale,
-            locale.node.Is.finish,
+            locales,
+            locales.get((l) => l.node.Is.finish),
             result instanceof BoolValue && result.bool,
-            new NodeRef(this.type, locale, context)
+            new NodeRef(this.type, locales, context)
         );
     }
 
@@ -194,7 +194,7 @@ export default class Is extends Expression {
         return Glyphs.Type;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
-        return [new NodeRef(this.type, locale, context)];
+    getDescriptionInputs(locales: Locales, context: Context) {
+        return [new NodeRef(this.type, locales, context)];
     }
 }
diff --git a/src/nodes/IsLocale.ts b/src/nodes/IsLocale.ts
index 4aa84c42a..e62938337 100644
--- a/src/nodes/IsLocale.ts
+++ b/src/nodes/IsLocale.ts
@@ -7,7 +7,6 @@ import Sym from './Sym';
 import { GLOBE1_SYMBOL } from '@parser/Symbols';
 import BoolValue from '@values/BoolValue';
 import { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import BooleanType from './BooleanType';
 import Glyphs from '../lore/Glyphs';
@@ -19,6 +18,7 @@ import type Bind from './Bind';
 import type Expression from './Expression';
 import type TypeSet from './TypeSet';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class IsLocale extends SimpleExpression {
     readonly globe: Token;
@@ -113,14 +113,14 @@ export default class IsLocale extends SimpleExpression {
         return this.locale ?? this.globe;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.IsLocale;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.IsLocale);
     }
 
-    getStartExplanations(locale: Locale) {
+    getStartExplanations(locales: Locales) {
         return concretize(
-            locale,
-            locale.node.IsLocale.start,
+            locales,
+            locales.get((l) => l.node.IsLocale.start),
             this.locale?.toWordplay() ?? '-'
         );
     }
diff --git a/src/nodes/KeyValue.ts b/src/nodes/KeyValue.ts
index 8975861a0..78f794cd1 100644
--- a/src/nodes/KeyValue.ts
+++ b/src/nodes/KeyValue.ts
@@ -2,13 +2,13 @@ import Expression from './Expression';
 import type { Grammar, Replacement } from './Node';
 import type Token from './Token';
 import BindToken from './BindToken';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import Node, { node } from './Node';
 import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 export default class KeyValue extends Node {
     readonly key: Expression;
@@ -43,13 +43,13 @@ export default class KeyValue extends Node {
             {
                 name: 'key',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.key,
+                label: (locales: Locales) => locales.get((l) => l.term.key),
             },
             { name: 'bind', kind: node(Sym.Bind) },
             {
                 name: 'value',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.value,
+                label: (locales: Locales) => locales.get((l) => l.term.value),
             },
         ];
     }
@@ -74,8 +74,8 @@ export default class KeyValue extends Node {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.KeyValue;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.KeyValue);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Language.ts b/src/nodes/Language.ts
index 542350254..07a6b6e9e 100644
--- a/src/nodes/Language.ts
+++ b/src/nodes/Language.ts
@@ -13,6 +13,7 @@ import Purpose from '../concepts/Purpose';
 import Sym from './Sym';
 import type Type from './Type';
 import type LanguageCode from '@locale/LanguageCode';
+import type Locales from '../locale/Locales';
 
 export default class Language extends Node {
     readonly slash: Token;
@@ -125,8 +126,8 @@ export default class Language extends Node {
         );
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Language;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Language);
     }
 
     getDescriptionInputs() {
diff --git a/src/nodes/ListAccess.ts b/src/nodes/ListAccess.ts
index d5a8ebfb8..79cfdedc6 100644
--- a/src/nodes/ListAccess.ts
+++ b/src/nodes/ListAccess.ts
@@ -20,7 +20,6 @@ import ListOpenToken from './ListOpenToken';
 import ListCloseToken from './ListCloseToken';
 import NumberLiteral from './NumberLiteral';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import { NotAType } from './NotAType';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
@@ -31,6 +30,7 @@ import IncompatibleInput from '../conflicts/IncompatibleInput';
 import concretize from '../locale/concretize';
 import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 export default class ListAccess extends Expression {
     readonly list: Expression;
@@ -77,7 +77,7 @@ export default class ListAccess extends Expression {
             {
                 name: 'list',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.list,
+                label: (locales: Locales) => locales.get((l) => l.term.list),
                 // Must be a list
                 getType: () => ListType.make(),
             },
@@ -85,7 +85,7 @@ export default class ListAccess extends Expression {
             {
                 name: 'index',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.index,
+                label: (locales: Locales) => locales.get((l) => l.term.index),
                 // Must be a number
                 getType: () => NumberType.make(),
             },
@@ -198,27 +198,27 @@ export default class ListAccess extends Expression {
         return current;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ListAccess;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ListAccess);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.ListAccess.start,
-            new NodeRef(this.list, locale, context)
+            locales,
+            locales.get((l) => l.node.ListAccess.start),
+            new NodeRef(this.list, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.ListAccess.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.ListAccess.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/ListLiteral.ts b/src/nodes/ListLiteral.ts
index 5f80fe340..94346d802 100644
--- a/src/nodes/ListLiteral.ts
+++ b/src/nodes/ListLiteral.ts
@@ -17,7 +17,6 @@ import type Conflict from '@conflicts/Conflict';
 import ListOpenToken from './ListOpenToken';
 import ListCloseToken from './ListCloseToken';
 import { node, type Grammar, type Replacement, list } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import type { BasisTypeName } from '../basis/BasisConstants';
@@ -26,6 +25,7 @@ import Sym from './Sym';
 import AnyType from './AnyType';
 import Spread from './Spread';
 import TypeException from '../values/TypeException';
+import type Locales from '../locale/Locales';
 
 export default class ListLiteral extends Expression {
     readonly open: Token;
@@ -60,8 +60,8 @@ export default class ListLiteral extends Expression {
             {
                 name: 'values',
                 kind: list(true, node(Expression), node(Spread)),
-                label: (translation: Locale) =>
-                    translation.node.ListLiteral.item,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.ListLiteral.item),
                 // Only allow types to be inserted that are of the list's type, if provided.
                 getType: (context) =>
                     this.getItemType(context)?.generalize(context) ??
@@ -198,23 +198,26 @@ export default class ListLiteral extends Expression {
         return this.close ?? this.values[this.values.length - 1] ?? this.open;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ListLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ListLiteral);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.ListLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.ListLiteral.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.ListLiteral.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.ListLiteral.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/ListType.ts b/src/nodes/ListType.ts
index accbbd83c..9eb5875c6 100644
--- a/src/nodes/ListType.ts
+++ b/src/nodes/ListType.ts
@@ -7,10 +7,10 @@ import Sym from './Sym';
 import Type from './Type';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import NodeRef from '../locale/NodeRef';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class ListType extends BasisType {
     readonly open: Token;
@@ -103,17 +103,17 @@ export default class ListType extends BasisType {
             : undefined;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.ListType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.ListType);
     }
 
     getGlyphs() {
         return Glyphs.List;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
-            this.type ? new NodeRef(this.type, locale, context) : undefined,
+            this.type ? new NodeRef(this.type, locales, context) : undefined,
         ];
     }
 }
diff --git a/src/nodes/Literal.ts b/src/nodes/Literal.ts
index f30078a20..7e907320e 100644
--- a/src/nodes/Literal.ts
+++ b/src/nodes/Literal.ts
@@ -5,8 +5,8 @@ import type Value from '@values/Value';
 import SimpleExpression from './SimpleExpression';
 import type Expression from './Expression';
 import Purpose from '../concepts/Purpose';
-import type Locale from '../locale/Locale';
 import type Context from './Context';
+import type Locales from '../locale/Locales';
 
 export default abstract class Literal extends SimpleExpression {
     constructor() {
@@ -29,8 +29,8 @@ export default abstract class Literal extends SimpleExpression {
     evaluate(evaluator: Evaluator, prior: Value | undefined): Value {
         if (prior) return prior;
 
-        return this.getValue(evaluator.getLocales());
+        return this.getValue(evaluator.locales);
     }
 
-    abstract getValue(locales: Locale[]): Value;
+    abstract getValue(locales: Locales): Value;
 }
diff --git a/src/nodes/MapLiteral.ts b/src/nodes/MapLiteral.ts
index e6a2d0feb..61a919ef4 100644
--- a/src/nodes/MapLiteral.ts
+++ b/src/nodes/MapLiteral.ts
@@ -21,13 +21,13 @@ import SetOpenToken from './SetOpenToken';
 import SetCloseToken from './SetCloseToken';
 import UnclosedDelimiter from '@conflicts/UnclosedDelimiter';
 import { node, type Grammar, type Replacement, optional, list } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import concretize from '../locale/concretize';
 import ValueException from '../values/ValueException';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export default class MapLiteral extends Expression {
     readonly open: Token;
@@ -205,23 +205,26 @@ export default class MapLiteral extends Expression {
         );
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.MapLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.MapLiteral);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.MapLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.MapLiteral.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.MapLiteral.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.MapLiteral.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/MapType.ts b/src/nodes/MapType.ts
index c6fceb604..6136df06c 100644
--- a/src/nodes/MapType.ts
+++ b/src/nodes/MapType.ts
@@ -10,12 +10,12 @@ import UnclosedDelimiter from '@conflicts/UnclosedDelimiter';
 import type Conflict from '@conflicts/Conflict';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement, any, none } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import NodeRef from '../locale/NodeRef';
 import Sym from './Sym';
 import TypePlaceholder from './TypePlaceholder';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class MapType extends BasisType {
     readonly open: Token;
@@ -135,18 +135,18 @@ export default class MapType extends BasisType {
             : undefined;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.MapType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.MapType);
     }
 
     getGlyphs() {
         return Glyphs.Map;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
-            this.key ? new NodeRef(this.key, locale, context) : undefined,
-            this.value ? new NodeRef(this.value, locale, context) : undefined,
+            this.key ? new NodeRef(this.key, locales, context) : undefined,
+            this.value ? new NodeRef(this.value, locales, context) : undefined,
         ];
     }
 }
diff --git a/src/nodes/Markup.ts b/src/nodes/Markup.ts
index 9153872b5..319d540c7 100644
--- a/src/nodes/Markup.ts
+++ b/src/nodes/Markup.ts
@@ -1,4 +1,3 @@
-import type Locale from '@locale/Locale';
 import Paragraph from './Paragraph';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
@@ -13,6 +12,7 @@ import type Node from './Node';
 import Words from './Words';
 import type { FormattedText } from '../output/Phrase';
 import type { FontWeight } from '../basis/Fonts';
+import type Locales from '../locale/Locales';
 
 /**
  * To refer to an input, use a $, followed by the number of the input desired,
@@ -68,8 +68,8 @@ export default class Markup extends Content {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Markup;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Markup);
     }
 
     getGlyphs() {
@@ -80,11 +80,11 @@ export default class Markup extends Content {
         return [this.paragraphs.length];
     }
 
-    concretize(locale: Locale, inputs: TemplateInput[]): Markup | undefined {
+    concretize(locales: Locales, inputs: TemplateInput[]): Markup | undefined {
         // Create an empty list of replacements which we'll recursively fill and then update space with.
         const replacements: [Node, Node][] = [];
         const concrete = this.paragraphs.map((p) =>
-            p.concretize(locale, inputs, replacements)
+            p.concretize(locales, inputs, replacements)
         );
 
         let newSpaces = this.spaces;
@@ -99,7 +99,7 @@ export default class Markup extends Content {
 
     getMatchingText(
         text: string,
-        locale: Locale[]
+        locales: Locales
     ): [string, number] | undefined {
         const wordsWithText = this.paragraphs
             .map((p) => p.nodes())
@@ -115,7 +115,7 @@ export default class Markup extends Content {
                   wordsWithText[0].getText(),
                   wordsWithText[0]
                       .getText()
-                      .toLocaleLowerCase(locale.map((l) => l.language))
+                      .toLocaleLowerCase(locales.getLanguages())
                       .indexOf(text),
               ];
     }
diff --git a/src/nodes/Mention.ts b/src/nodes/Mention.ts
index 60d27e025..21629535a 100644
--- a/src/nodes/Mention.ts
+++ b/src/nodes/Mention.ts
@@ -10,6 +10,7 @@ import { node, type Replacement, type Grammar } from './Node';
 import Token from './Token';
 import Sym from './Sym';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 /**
  * To refer to an input, use a $, followed by the number of the input desired,
@@ -52,8 +53,8 @@ export default class Mention extends Content {
     getPurpose() {
         return Purpose.Document;
     }
-    getNodeLocale(locale: Locale) {
-        return locale.node.Mention;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Mention);
     }
 
     getGlyphs(): Glyph {
@@ -61,7 +62,7 @@ export default class Mention extends Content {
     }
 
     concretize(
-        locale: Locale,
+        locales: Locales,
         inputs: TemplateInput[],
         replacements: [Node, Node][]
     ): Token | ValueRef | NodeRef | undefined {
@@ -72,7 +73,7 @@ export default class Mention extends Content {
         const numberMatch = name.match(/^[0-9]+/);
         if (name === '?') {
             const replacement = new Token(
-                locale.ui.template.unwritten,
+                locales.get((l) => l.ui.template.unwritten),
                 Sym.Words
             );
             replacements.push([this, replacement]);
@@ -105,6 +106,7 @@ export default class Mention extends Content {
         // Try to resolve terminology.
         else {
             const id = name as keyof Locale['term'];
+            const locale = locales.getLocale();
             const phrase = Object.hasOwn(locale.term, id)
                 ? locale.term[id]
                 : undefined;
diff --git a/src/nodes/Name.ts b/src/nodes/Name.ts
index d28ed1bfb..fec97b939 100644
--- a/src/nodes/Name.ts
+++ b/src/nodes/Name.ts
@@ -3,7 +3,6 @@ import Token from './Token';
 import type Conflict from '@conflicts/Conflict';
 import Language from './Language';
 import NameToken from './NameToken';
-import type Locale from '@locale/Locale';
 import { COMMA_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import Emotion from '../lore/Emotion';
@@ -14,6 +13,7 @@ import Evaluate from './Evaluate';
 import ReservedSymbols from '../parser/ReservedSymbols';
 import Node, { node, optional } from './Node';
 import { LanguageTagged } from './LanguageTagged';
+import type Locales from '../locale/Locales';
 
 export default class Name extends LanguageTagged {
     readonly separator: Token | undefined;
@@ -144,8 +144,8 @@ export default class Name extends LanguageTagged {
         );
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Name;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Name);
     }
 
     getDescriptionInputs() {
diff --git a/src/nodes/NameType.ts b/src/nodes/NameType.ts
index 78d6db758..eea19e51d 100644
--- a/src/nodes/NameType.ts
+++ b/src/nodes/NameType.ts
@@ -15,10 +15,10 @@ import type { BasisTypeName } from '../basis/BasisConstants';
 import UnknownNameType from './UnknownNameType';
 import type Node from './Node';
 import { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import { UnknownName } from '@conflicts/UnknownName';
 import Emotion from '../lore/Emotion';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export default class NameType extends Type {
     readonly name: Token;
@@ -167,8 +167,8 @@ export default class NameType extends Type {
         return 'name';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.NameType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NameType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Names.ts b/src/nodes/Names.ts
index 8a80cb62d..21037354e 100644
--- a/src/nodes/Names.ts
+++ b/src/nodes/Names.ts
@@ -11,6 +11,7 @@ import Purpose from '../concepts/Purpose';
 import Emotion from '../lore/Emotion';
 import Node, { list, node } from './Node';
 import { getPreferred as getPreferredName } from './LanguageTagged';
+import type Locales from '../locale/Locales';
 
 export default class Names extends Node {
     readonly names: Name[];
@@ -151,8 +152,8 @@ export default class Names extends Node {
         return this.names.find((name) => name.startsWith(prefix));
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.Names;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Names);
     }
 
     withName(name: string, language: LanguageCode) {
diff --git a/src/nodes/NeverType.ts b/src/nodes/NeverType.ts
index 4473910e6..034411390 100644
--- a/src/nodes/NeverType.ts
+++ b/src/nodes/NeverType.ts
@@ -1,8 +1,8 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import Type from './Type';
 import Glyphs from '../lore/Glyphs';
 import { NEVER_SYMBOL } from '@parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export default class NeverType extends Type {
     constructor() {
@@ -31,8 +31,8 @@ export default class NeverType extends Type {
         return new NeverType() as this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.NeverType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NeverType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/NoExpressionType.ts b/src/nodes/NoExpressionType.ts
index a024b3eeb..12e622418 100644
--- a/src/nodes/NoExpressionType.ts
+++ b/src/nodes/NoExpressionType.ts
@@ -1,14 +1,17 @@
-import type Locale from '@locale/Locale';
 import type Expression from './Expression';
 import UnknownType from './UnknownType';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class NoExpressionType extends UnknownType<Expression> {
     constructor(expression: Expression) {
         super(expression, undefined);
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.NoExpressionType.name);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.NoExpressionType.name)
+        );
     }
 }
diff --git a/src/nodes/Node.ts b/src/nodes/Node.ts
index af60fd665..af2f277cd 100644
--- a/src/nodes/Node.ts
+++ b/src/nodes/Node.ts
@@ -18,6 +18,7 @@ import type { TemplateInput } from '../locale/concretize';
 import type Markup from './Markup';
 import type Sym from './Sym';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 /* A global ID for nodes, for helping index them */
 let NODE_ID_COUNTER = 0;
@@ -641,8 +642,8 @@ export default abstract class Node {
     /**
      * Given a locale, get the node's static label
      * */
-    getLabel(locale: Locale): string {
-        return this.getNodeLocale(locale).name;
+    getLabel(locales: Locales): string {
+        return this.getNodeLocale(locales).name;
     }
 
     /**
@@ -650,29 +651,29 @@ export default abstract class Node {
      * */
     getDescription(
         concretizer: Concretizer,
-        locale: Locale,
+        locales: Locales,
         context: Context
     ): Markup {
-        const text = this.getNodeLocale(locale);
+        const text = this.getNodeLocale(locales);
         return concretizer(
-            locale,
+            locales,
             // Is there a description? Use that. Otherwise just use the name.
             'description' in text
                 ? (text as DescriptiveNodeText).description
                 : text.name,
-            ...this.getDescriptionInputs(locale, context)
+            ...this.getDescriptionInputs(locales, context)
         );
     }
 
     /**
      * Get the list of inputs to give to concretize the description.
      */
-    getDescriptionInputs(_: Locale, __: Context): TemplateInput[] {
+    getDescriptionInputs(_: Locales, __: Context): TemplateInput[] {
         return [];
     }
 
-    getDoc(locale: Locale): DocText {
-        return this.getNodeLocale(locale).doc;
+    getDoc(locales: Locales): DocText {
+        return this.getNodeLocale(locales).doc;
     }
 
     /**
@@ -684,17 +685,17 @@ export default abstract class Node {
         return undefined;
     }
 
-    abstract getNodeLocale(locale: Locale): NodeText | DescriptiveNodeText;
+    abstract getNodeLocale(locales: Locales): NodeText | DescriptiveNodeText;
 
     /** Provide localized labels for any child that can be a placeholder. */
     getChildPlaceholderLabel(
         child: Node,
-        translation: Locale,
+        locales: Locales,
         context: Context,
         root: Root
     ): Template | undefined {
         const label = this.getFieldOfChild(child)?.label;
-        return label ? label(translation, child, context, root) : undefined;
+        return label ? label(locales, child, context, root) : undefined;
     }
 
     /** Translates the node back into Wordplay text, using spaces if provided and . */
@@ -732,7 +733,7 @@ export type Field = {
     kind: Any | Empty | ListOf | IsA;
     /** A description of the field for the UI */
     label?: (
-        locale: Locale,
+        locales: Locales,
         child: Node,
         context: Context,
         root: Root
diff --git a/src/nodes/NonFunctionType.ts b/src/nodes/NonFunctionType.ts
index 3f38f15f5..ef8fb6bbf 100644
--- a/src/nodes/NonFunctionType.ts
+++ b/src/nodes/NonFunctionType.ts
@@ -1,15 +1,18 @@
 import type Type from './Type';
 import UnknownType from './UnknownType';
-import type Locale from '@locale/Locale';
 import type Expression from './Expression';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export class NonFunctionType extends UnknownType<Expression> {
     constructor(expression: Expression, given: Type) {
         super(expression, given);
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.NonFunctionType.description);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.NonFunctionType.description)
+        );
     }
 }
diff --git a/src/nodes/NoneLiteral.ts b/src/nodes/NoneLiteral.ts
index 8d11c1477..d4e1519b2 100644
--- a/src/nodes/NoneLiteral.ts
+++ b/src/nodes/NoneLiteral.ts
@@ -8,11 +8,11 @@ import type TypeSet from './TypeSet';
 import { NONE_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import Node, { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import Literal from './Literal';
 import Glyphs from '../lore/Glyphs';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class NoneLiteral extends Literal {
     readonly none: Token;
@@ -92,12 +92,15 @@ export default class NoneLiteral extends Literal {
         return current;
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.NoneLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NoneLiteral);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.NoneLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.NoneLiteral.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/NoneType.ts b/src/nodes/NoneType.ts
index 3e0fb6ca0..4b6729a64 100644
--- a/src/nodes/NoneType.ts
+++ b/src/nodes/NoneType.ts
@@ -1,12 +1,12 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { NONE_SYMBOL } from '@parser/Symbols';
-import type Locale from '@locale/Locale';
 import BasisType from './BasisType';
 import { node, type Grammar, type Replacement } from './Node';
 import Token from './Token';
 import Sym from './Sym';
 import type TypeSet from './TypeSet';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export default class NoneType extends BasisType {
     readonly none: Token;
@@ -51,8 +51,8 @@ export default class NoneType extends BasisType {
         return 'none';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.NoneType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NoneType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/NotAType.ts b/src/nodes/NotAType.ts
index 6524e12ea..469e3ba39 100644
--- a/src/nodes/NotAType.ts
+++ b/src/nodes/NotAType.ts
@@ -1,11 +1,11 @@
 import type Type from './Type';
 import UnknownType from './UnknownType';
-import type Locale from '@locale/Locale';
 import type Expression from './Expression';
 import type Context from './Context';
 import type { TemplateInput } from '../locale/concretize';
 import NodeRef from '../locale/NodeRef';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export class NotAType extends UnknownType<Expression> {
     readonly given: Type;
@@ -16,15 +16,15 @@ export class NotAType extends UnknownType<Expression> {
         this.expected = expected;
     }
 
-    getReason(concretize: Concretizer, locale: Locale, context: Context) {
+    getReason(concretize: Concretizer, locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.NotAType.description,
-            new NodeRef(this.expected, locale, context)
+            locales,
+            locales.get((l) => l.node.NotAType.description),
+            new NodeRef(this.expected, locales, context)
         );
     }
 
-    getDescriptionInputs(locale: Locale, context: Context): TemplateInput[] {
-        return [new NodeRef(this.expected, locale, context)];
+    getDescriptionInputs(locales: Locales, context: Context): TemplateInput[] {
+        return [new NodeRef(this.expected, locales, context)];
     }
 }
diff --git a/src/nodes/NumberLiteral.ts b/src/nodes/NumberLiteral.ts
index 38e6f0144..a354f85b9 100644
--- a/src/nodes/NumberLiteral.ts
+++ b/src/nodes/NumberLiteral.ts
@@ -10,13 +10,13 @@ import type Context from './Context';
 import type TypeSet from './TypeSet';
 import Sym from './Sym';
 import Node, { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Literal from './Literal';
 import Glyphs from '../lore/Glyphs';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import type Decimal from 'decimal.js';
 import concretize, { type TemplateInput } from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class NumberLiteral extends Literal {
     readonly number: Token;
@@ -152,15 +152,15 @@ export default class NumberLiteral extends Literal {
         return this.number;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.NumberLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NumberLiteral);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.NumberLiteral.start,
-            new NodeRef(this.number, locale, context)
+            locales,
+            locales.get((l) => l.node.NumberLiteral.start),
+            new NodeRef(this.number, locales, context)
         );
     }
 
@@ -168,10 +168,10 @@ export default class NumberLiteral extends Literal {
         return Glyphs.Number;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context): TemplateInput[] {
+    getDescriptionInputs(locales: Locales, context: Context): TemplateInput[] {
         return [
             this.number.getText(),
-            this.unit ? new NodeRef(this.unit, locale, context) : undefined,
+            this.unit ? new NodeRef(this.unit, locales, context) : undefined,
         ];
     }
 
diff --git a/src/nodes/NumberType.ts b/src/nodes/NumberType.ts
index 75497f535..7fae80cc2 100644
--- a/src/nodes/NumberType.ts
+++ b/src/nodes/NumberType.ts
@@ -13,9 +13,9 @@ import Evaluate from './Evaluate';
 import PropertyReference from './PropertyReference';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import NodeRef from '../locale/NodeRef';
+import type Locales from '../locale/Locales';
 
 type UnitDeriver = (
     left: Unit,
@@ -207,18 +207,18 @@ export default class NumberType extends BasisType {
         return 'measurement';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.NumberType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.NumberType);
     }
 
     getGlyphs() {
         return Glyphs.Number;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
             this.unit instanceof Unit
-                ? new NodeRef(this.unit, locale, context)
+                ? new NodeRef(this.unit, locales, context)
                 : undefined,
         ];
     }
diff --git a/src/nodes/Paragraph.ts b/src/nodes/Paragraph.ts
index b4656a7a4..94183d444 100644
--- a/src/nodes/Paragraph.ts
+++ b/src/nodes/Paragraph.ts
@@ -1,5 +1,4 @@
 import type Conflict from '@conflicts/Conflict';
-import type Locale from '@locale/Locale';
 import ConceptLink from './ConceptLink';
 import Example from './Example';
 import WebLink from './WebLink';
@@ -17,6 +16,7 @@ import Branch from './Branch';
 import { unescapeMarkupSymbols } from '../parser/Tokenizer';
 import Node, { list, node } from '@nodes/Node';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export type NodeSegment =
     | Token
@@ -79,8 +79,8 @@ export default class Paragraph extends Content {
         return Purpose.Document;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Paragraph;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Paragraph);
     }
 
     getGlyphs() {
@@ -88,7 +88,7 @@ export default class Paragraph extends Content {
     }
 
     concretize(
-        locale: Locale,
+        locales: Locales,
         inputs: TemplateInput[],
         replacements: [Node, Node][]
     ): Paragraph | undefined {
@@ -104,7 +104,7 @@ export default class Paragraph extends Content {
                     replacements.push([content, replacement]);
                     return replacement;
                 } else return content;
-            } else return content.concretize(locale, inputs, replacements);
+            } else return content.concretize(locales, inputs, replacements);
         });
         return concreteSegments.some((s) => s === undefined)
             ? undefined
diff --git a/src/nodes/Previous.ts b/src/nodes/Previous.ts
index 03ec7f185..903159e62 100644
--- a/src/nodes/Previous.ts
+++ b/src/nodes/Previous.ts
@@ -21,7 +21,6 @@ import Start from '@runtime/Start';
 import UnionType from './UnionType';
 import NoneType from './NoneType';
 import { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
@@ -30,6 +29,7 @@ import ExpressionPlaceholder from './ExpressionPlaceholder';
 import Purpose from '../concepts/Purpose';
 import ListType from './ListType';
 import Unit from './Unit';
+import type Locales from '../locale/Locales';
 
 export default class Previous extends Expression {
     readonly previous: Token;
@@ -86,7 +86,7 @@ export default class Previous extends Expression {
             {
                 name: 'number',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.index,
+                label: (locales: Locales) => locales.get((l) => l.term.index),
                 // Must be a number
                 getType: () => NumberType.make(),
                 space: true,
@@ -94,7 +94,7 @@ export default class Previous extends Expression {
             {
                 name: 'stream',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.stream,
+                label: (locales: Locales) => locales.get((l) => l.term.stream),
                 // Must be a stream
                 getType: () => StreamType.make(new AnyType()),
                 space: true,
@@ -210,27 +210,27 @@ export default class Previous extends Expression {
         return this.previous;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Previous;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Previous);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Previous.start,
-            new NodeRef(this.stream, locale, context)
+            locales,
+            locales.get((l) => l.node.Previous.start),
+            new NodeRef(this.stream, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Previous.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Previous.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Program.test.ts b/src/nodes/Program.test.ts
index 3145480c5..84adeb49b 100644
--- a/src/nodes/Program.test.ts
+++ b/src/nodes/Program.test.ts
@@ -6,6 +6,7 @@ import Project from '../models/Project';
 import type Value from '../values/Value';
 import { DB } from '../db/Database';
 import DefaultLocale from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 test.each([
     // A single source with 1 should evaluate to 1
@@ -24,9 +25,11 @@ test.each([
                 .map((code, index) => new Source(`sup${index + 1}`, code)),
             DefaultLocale
         );
-        const value = new Evaluator(project, DB, [
-            DefaultLocale,
-        ]).getInitialValue();
+        const value = new Evaluator(
+            project,
+            DB,
+            new Locales([DefaultLocale], DefaultLocale)
+        ).getInitialValue();
         expect(value).toBeDefined();
         expect((value as Value).constructor).toBe(valueType);
     }
diff --git a/src/nodes/Program.ts b/src/nodes/Program.ts
index b57dbddf1..6befdb811 100644
--- a/src/nodes/Program.ts
+++ b/src/nodes/Program.ts
@@ -19,7 +19,6 @@ import type Type from './Type';
 import type TypeSet from './TypeSet';
 import type Value from '@values/Value';
 import { node, type Grammar, type Replacement, optional, list } from './Node';
-import type Locale from '@locale/Locale';
 import type LanguageCode from '@locale/LanguageCode';
 import Sym from './Sym';
 import Glyphs from '../lore/Glyphs';
@@ -27,6 +26,7 @@ import BlankException from '@values/BlankException';
 import concretize from '../locale/concretize';
 import Purpose from '../concepts/Purpose';
 import ValueRef from '../locale/ValueRef';
+import type Locales from '../locale/Locales';
 
 export default class Program extends Expression {
     readonly docs?: Docs;
@@ -183,12 +183,12 @@ export default class Program extends Expression {
         return this.end ?? this.expression;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Program;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Program);
     }
 
     getStartExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
@@ -196,26 +196,26 @@ export default class Program extends Expression {
         const change = reaction && reaction.changes.length > 0;
 
         return concretize(
-            locale,
-            locale.node.Program.start,
+            locales,
+            locales.get((l) => l.node.Program.start),
             change
-                ? new ValueRef(reaction.changes[0].stream, locale, context)
+                ? new ValueRef(reaction.changes[0].stream, locales, context)
                 : undefined,
             change
-                ? new ValueRef(reaction.changes[0].value, locale, context)
+                ? new ValueRef(reaction.changes[0].value, locales, context)
                 : undefined
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Program.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Program.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/PropertyBind.test.ts b/src/nodes/PropertyBind.test.ts
index 00d8542ff..43278fbd9 100644
--- a/src/nodes/PropertyBind.test.ts
+++ b/src/nodes/PropertyBind.test.ts
@@ -1,9 +1,10 @@
 import { test, expect } from 'vitest';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     ['•Test(n•#)\nb: Test(1).n: 2\nb.n', '2'],
     ['•Test(n•#)\nb: (Test(1).n: 2).n: 3\nb.n', '3'],
 ])('Expect "%s" to be "%s"', (source, value) => {
-    expect(evaluateCode(source)?.toWordplay([])).toBe(value);
+    expect(evaluateCode(source)?.toWordplay(DefaultLocales)).toBe(value);
 });
diff --git a/src/nodes/PropertyBind.ts b/src/nodes/PropertyBind.ts
index a15593ca1..e9a2f376a 100644
--- a/src/nodes/PropertyBind.ts
+++ b/src/nodes/PropertyBind.ts
@@ -12,7 +12,6 @@ import type TypeSet from './TypeSet';
 import NameException from '@values/NameException';
 import type Value from '@values/Value';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import BindToken from './BindToken';
 import StructureValue from '../values/StructureValue';
 import ValueException from '../values/ValueException';
@@ -26,6 +25,7 @@ import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import Reference from './Reference';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class PropertyBind extends Expression {
     readonly reference: PropertyReference;
@@ -166,26 +166,29 @@ export default class PropertyBind extends Expression {
         return this.bind;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.PropertyBind;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.PropertyBind);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.PropertyBind.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.PropertyBind.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.PropertyBind.finish,
+            locales,
+            locales.get((l) => l.node.PropertyBind.finish),
             this.reference.name
-                ? new NodeRef(this.reference.name, locale, context)
+                ? new NodeRef(this.reference.name, locales, context)
                 : undefined,
-            this.getValueIfDefined(locale, context, evaluator)
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
@@ -193,10 +196,10 @@ export default class PropertyBind extends Expression {
         return Glyphs.Bind;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
             this.reference.name
-                ? new NodeRef(this.reference.name, locale, context)
+                ? new NodeRef(this.reference.name, locales, context)
                 : undefined,
         ];
     }
diff --git a/src/nodes/PropertyReference.ts b/src/nodes/PropertyReference.ts
index 01d8812e6..56c13dc37 100644
--- a/src/nodes/PropertyReference.ts
+++ b/src/nodes/PropertyReference.ts
@@ -25,7 +25,6 @@ import Reference from './Reference';
 import NameType from './NameType';
 import UnknownNameType from './UnknownNameType';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import UnimplementedException from '../values/UnimplementedException';
@@ -36,6 +35,7 @@ import ExpressionPlaceholder from './ExpressionPlaceholder';
 import Refer from '../edit/Refer';
 import FunctionDefinition from './FunctionDefinition';
 import BasisType from './BasisType';
+import type Locales from '../locale/Locales';
 
 export default class PropertyReference extends Expression {
     readonly structure: Expression;
@@ -141,8 +141,8 @@ export default class PropertyReference extends Expression {
                 name: 'name',
                 kind: node(Reference),
                 // The label is
-                label: (translation: Locale) =>
-                    translation.node.PropertyReference.property,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.PropertyReference.property),
                 // The valid definitions of the name are based on the referenced structure type, prefix filtered by whatever name is already provided.
                 getDefinitions: (context: Context) => {
                     let defs = this.getDefinitions(this, context);
@@ -358,26 +358,29 @@ export default class PropertyReference extends Expression {
         return this.name ?? this.dot;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.PropertyReference;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.PropertyReference);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.PropertyReference.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.PropertyReference.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.PropertyReference.finish,
+            locales,
+            locales.get((l) => l.node.PropertyReference.finish),
             this.name
-                ? new NodeRef(this.name, locale, context, this.name?.getName())
+                ? new NodeRef(this.name, locales, context, this.name?.getName())
                 : undefined,
-            this.getValueIfDefined(locale, context, evaluator)
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
@@ -385,9 +388,9 @@ export default class PropertyReference extends Expression {
         return Glyphs.Reference;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
-            this.name ? new NodeRef(this.name, locale, context) : undefined,
+            this.name ? new NodeRef(this.name, locales, context) : undefined,
         ];
     }
 }
diff --git a/src/nodes/Reaction.test.ts b/src/nodes/Reaction.test.ts
index ffbe920aa..264ab141a 100644
--- a/src/nodes/Reaction.test.ts
+++ b/src/nodes/Reaction.test.ts
@@ -11,6 +11,7 @@ import Reaction from './Reaction';
 import ExpectedStream from '../conflicts/ExpectedStream';
 import { DB } from '../db/Database';
 import DefaultLocale from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 const makeOne = (creator: Expression) => Time.make(creator, 1);
 
@@ -50,7 +51,11 @@ test.each([
         // Make the project
         const source = new Source('test', code);
         const project = Project.make(null, 'test', source, [], DefaultLocale);
-        const evaluator = new Evaluator(project, DB, [DefaultLocale]);
+        const evaluator = new Evaluator(
+            project,
+            DB,
+            new Locales([DefaultLocale], DefaultLocale)
+        );
 
         evaluator.start();
 
diff --git a/src/nodes/Reaction.ts b/src/nodes/Reaction.ts
index f6cb20bff..6832ed62e 100644
--- a/src/nodes/Reaction.ts
+++ b/src/nodes/Reaction.ts
@@ -14,7 +14,6 @@ import UnionType from './UnionType';
 import type TypeSet from './TypeSet';
 import ExceptionValue from '@values/ExceptionValue';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import BooleanType from './BooleanType';
 import ExpectedBooleanCondition from '../conflicts/ExpectedBooleanCondition';
 import Check from '@runtime/Check';
@@ -31,6 +30,7 @@ import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import type Node from './Node';
 import UnknownType from './UnknownType';
+import type Locales from '../locale/Locales';
 
 export default class Reaction extends Expression {
     readonly initial: Expression;
@@ -92,16 +92,16 @@ export default class Reaction extends Expression {
             {
                 name: 'initial',
                 kind: node(Expression),
-                label: (translation: Locale) =>
-                    translation.node.Reaction.initial,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Reaction.initial),
             },
             { name: 'dots', kind: node(Sym.Stream), space: true },
             {
                 name: 'condition',
                 kind: node(Expression),
                 space: true,
-                label: (translation: Locale) =>
-                    translation.node.Reaction.condition,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Reaction.condition),
                 getType: () => BooleanType.make(),
             },
             {
@@ -113,7 +113,8 @@ export default class Reaction extends Expression {
             {
                 name: 'next',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.node.Reaction.next,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Reaction.next),
                 space: true,
                 indent: true,
             },
@@ -300,23 +301,26 @@ export default class Reaction extends Expression {
         return this.dots;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Reaction;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Reaction);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Reaction.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Reaction.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Reaction.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Reaction.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Reference.ts b/src/nodes/Reference.ts
index 6d252ac2d..8395c922a 100644
--- a/src/nodes/Reference.ts
+++ b/src/nodes/Reference.ts
@@ -21,7 +21,6 @@ import NameToken from './NameToken';
 import StartFinish from '@runtime/StartFinish';
 import UnknownNameType from './UnknownNameType';
 import { node, type Grammar, type Replacement, ListOf } from './Node';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import NameException from '@values/NameException';
 import NodeRef from '@locale/NodeRef';
@@ -35,6 +34,7 @@ import StructureDefinition from './StructureDefinition';
 import FunctionDefinition from './FunctionDefinition';
 import StreamDefinition from './StreamDefinition';
 import FunctionType from './FunctionType';
+import type Locales from '../locale/Locales';
 
 /**
  * A reference to some Definition. Can optionally take the definition which it refers,
@@ -166,7 +166,8 @@ export default class Reference extends SimpleExpression {
                 name: 'name',
                 kind: node(Sym.Name),
                 uncompletable: true,
-                label: (translation: Locale) => translation.node.Reference.name,
+                label: (locales: Locales) =>
+                    locales.get((l) => l.node.Reference.name),
                 // The valid definitions of the name are anything in scope, except for the current name.
                 getDefinitions: (context: Context) =>
                     this.getDefinitionsInScope(context).filter(
@@ -354,15 +355,15 @@ export default class Reference extends SimpleExpression {
         return this.name;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Reference;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Reference);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Reference.start,
-            new NodeRef(this.name, locale, context)
+            locales,
+            locales.get((l) => l.node.Reference.start),
+            new NodeRef(this.name, locales, context)
         );
     }
 
diff --git a/src/nodes/Root.ts b/src/nodes/Root.ts
index 127da3af0..35dd4fe2f 100644
--- a/src/nodes/Root.ts
+++ b/src/nodes/Root.ts
@@ -1,6 +1,6 @@
 import Expression from './Expression';
 import type Node from './Node';
-import DefaultLocale from '../locale/DefaultLocale';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 export type Path = { type: string; index: number }[];
 
@@ -156,7 +156,7 @@ export default class Root {
             return [
                 ...this.getPath(parent),
                 {
-                    type: parent.getNodeLocale(DefaultLocale).name,
+                    type: parent.getNodeLocale(DefaultLocales).name,
                     index: parent.getChildren().indexOf(node),
                 },
             ];
@@ -175,7 +175,7 @@ export default class Root {
             node && index !== undefined ? node.getChildren()[index] : undefined;
 
         // If the type of node doesn't match, this path doesn't resolve.
-        return node.getNodeLocale(DefaultLocale).name !== type ||
+        return node.getNodeLocale(DefaultLocales).name !== type ||
             child === undefined
             ? undefined
             : // Otherwise, ask the corresponding child to continue resolving the path, unless there isn't one,
diff --git a/src/nodes/Row.ts b/src/nodes/Row.ts
index 9b139c5c8..95506adc1 100644
--- a/src/nodes/Row.ts
+++ b/src/nodes/Row.ts
@@ -2,7 +2,6 @@ import type { Grammar, Replacement } from './Node';
 import Token from './Token';
 import Bind from './Bind';
 import Expression from './Expression';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import Node, { any, list, node } from './Node';
@@ -15,6 +14,7 @@ import ExceptionValue from '@values/ExceptionValue';
 import ValueException from '../values/ValueException';
 import StructureValue from '../values/StructureValue';
 import { TABLE_CLOSE_SYMBOL, TABLE_OPEN_SYMBOL } from '../parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export default class Row extends Node {
     readonly open: Token;
@@ -81,8 +81,8 @@ export default class Row extends Node {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Row;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Row);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Select.test.ts b/src/nodes/Select.test.ts
index 65d2967b7..3e88abf52 100644
--- a/src/nodes/Select.test.ts
+++ b/src/nodes/Select.test.ts
@@ -5,6 +5,7 @@ import ExpectedSelectName from '@conflicts/ExpectedSelectName';
 import Select from './Select';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     [
@@ -45,5 +46,5 @@ test.each([
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡3 4⎦ ⎡? b ⎦ a < 2', '⎡ 2 ⎦'],
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡3 4⎦ ⎡? b a⎦ a < 2', '⎡ 2 1 ⎦'],
 ])('%s = %s', (code: string, value: string) => {
-    expect(evaluateCode(code)?.toWordplay([])).toBe(value);
+    expect(evaluateCode(code)?.toWordplay(DefaultLocales)).toBe(value);
 });
diff --git a/src/nodes/Select.ts b/src/nodes/Select.ts
index ed95bb8ac..5a12c2324 100644
--- a/src/nodes/Select.ts
+++ b/src/nodes/Select.ts
@@ -19,7 +19,6 @@ import type TypeSet from './TypeSet';
 import type Evaluator from '@runtime/Evaluator';
 import UnknownNameType from './UnknownNameType';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
@@ -37,6 +36,7 @@ import { SELECT_SYMBOL, TABLE_CLOSE_SYMBOL } from '../parser/Symbols';
 import Sym from './Sym';
 import Token from './Token';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 type SelectState = {
     table: TableValue;
@@ -76,18 +76,18 @@ export default class Select extends Expression {
             {
                 name: 'table',
                 kind: node(Expression),
-                label: (locale: Locale) => locale.term.table,
+                label: (locales: Locales) => locales.get((l) => l.term.table),
             },
             {
                 name: 'row',
                 kind: node(Row),
-                label: (locale: Locale) => locale.term.row,
+                label: (locales: Locales) => locales.get((l) => l.term.row),
                 space: true,
             },
             {
                 name: 'query',
                 kind: node(Expression),
-                label: (locale: Locale) => locale.term.query,
+                label: (locales: Locales) => locales.get((l) => l.term.query),
                 space: true,
             },
         ];
@@ -322,27 +322,27 @@ export default class Select extends Expression {
         return this.row.close ?? this.row.open;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Select;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Select);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Select.start,
-            new NodeRef(this.table, locale, context)
+            locales,
+            locales.get((l) => l.node.Select.start),
+            new NodeRef(this.table, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Select.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Select.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/SetLiteral.ts b/src/nodes/SetLiteral.ts
index b94a9d269..5441853b4 100644
--- a/src/nodes/SetLiteral.ts
+++ b/src/nodes/SetLiteral.ts
@@ -15,7 +15,6 @@ import type Bind from './Bind';
 import { SET_CLOSE_SYMBOL, SET_OPEN_SYMBOL } from '@parser/Symbols';
 import Sym from './Sym';
 import { node, type Grammar, type Replacement, list } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import Purpose from '../concepts/Purpose';
@@ -24,6 +23,7 @@ import SetCloseToken from './SetCloseToken';
 import type Conflict from '../conflicts/Conflict';
 import concretize from '../locale/concretize';
 import AnyType from './AnyType';
+import type Locales from '../locale/Locales';
 
 export default class SetLiteral extends Expression {
     readonly open: Token;
@@ -155,23 +155,26 @@ export default class SetLiteral extends Expression {
         return this.close ?? this.values[this.values.length - 1] ?? this.open;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.SetLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.SetLiteral);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.SetLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.SetLiteral.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.SetLiteral.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.SetLiteral.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/SetOrMapAccess.ts b/src/nodes/SetOrMapAccess.ts
index a96501654..53dfec247 100644
--- a/src/nodes/SetOrMapAccess.ts
+++ b/src/nodes/SetOrMapAccess.ts
@@ -22,7 +22,6 @@ import SetOpenToken from './SetOpenToken';
 import SetCloseToken from './SetCloseToken';
 import UnclosedDelimiter from '@conflicts/UnclosedDelimiter';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import type { BasisTypeName } from '../basis/BasisConstants';
@@ -31,6 +30,7 @@ import IncompatibleInput from '../conflicts/IncompatibleInput';
 import { NotAType } from './NotAType';
 import concretize from '../locale/concretize';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export default class SetOrMapAccess extends Expression {
     readonly setOrMap: Expression;
@@ -68,7 +68,7 @@ export default class SetOrMapAccess extends Expression {
             {
                 name: 'setOrMap',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.set,
+                label: (locales: Locales) => locales.get((l) => l.term.set),
                 // Must be a number
                 getType: () => UnionType.make(SetType.make(), MapType.make()),
             },
@@ -76,7 +76,7 @@ export default class SetOrMapAccess extends Expression {
             {
                 name: 'key',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.key,
+                label: (locales: Locales) => locales.get((l) => l.term.key),
             },
             { name: 'close', kind: node(Sym.SetClose) },
         ];
@@ -196,27 +196,27 @@ export default class SetOrMapAccess extends Expression {
         return this.close ?? this.key;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.SetOrMapAccess;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.SetOrMapAccess);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.SetOrMapAccess.start,
-            new NodeRef(this.setOrMap, locale, context)
+            locales,
+            locales.get((l) => l.node.SetOrMapAccess.start),
+            new NodeRef(this.setOrMap, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.SetOrMapAccess.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.SetOrMapAccess.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/SetType.ts b/src/nodes/SetType.ts
index b54a173ad..32029892f 100644
--- a/src/nodes/SetType.ts
+++ b/src/nodes/SetType.ts
@@ -9,11 +9,11 @@ import UnclosedDelimiter from '@conflicts/UnclosedDelimiter';
 import type Conflict from '@conflicts/Conflict';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement, optional } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import NodeRef from '../locale/NodeRef';
 import Sym from './Sym';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class SetType extends BasisType {
     readonly open: Token;
@@ -100,15 +100,15 @@ export default class SetType extends BasisType {
             : undefined;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.SetType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.SetType);
     }
 
     getGlyphs() {
         return Glyphs.Set;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
-        return [this.key ? new NodeRef(this.key, locale, context) : undefined];
+    getDescriptionInputs(locales: Locales, context: Context) {
+        return [this.key ? new NodeRef(this.key, locales, context) : undefined];
     }
 }
diff --git a/src/nodes/SimpleExpression.ts b/src/nodes/SimpleExpression.ts
index 86461a4e9..a1ed5b955 100644
--- a/src/nodes/SimpleExpression.ts
+++ b/src/nodes/SimpleExpression.ts
@@ -1,15 +1,15 @@
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import type Context from './Context';
 import Expression, { ExpressionKind } from './Expression';
+import type Locales from '../locale/Locales';
 
 export default abstract class SimpleExpression extends Expression {
     getFinishExplanations(
-        translation: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
-        return this.getStartExplanations(translation, context, evaluator);
+        return this.getStartExplanations(locales, context, evaluator);
     }
 
     getKind() {
diff --git a/src/nodes/Source.ts b/src/nodes/Source.ts
index 47e32893d..8f73b24da 100644
--- a/src/nodes/Source.ts
+++ b/src/nodes/Source.ts
@@ -30,6 +30,7 @@ import Markup from './Markup';
 import Purpose from '../concepts/Purpose';
 import Tokens from '../parser/Tokens';
 import type Definition from './Definition';
+import type Locales from '../locale/Locales';
 
 /** A document representing executable Wordplay code and it's various metadata, such as conflicts, tokens, and evaulator. */
 export default class Source extends Expression {
@@ -918,8 +919,8 @@ export default class Source extends Expression {
         return this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Source;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Source);
     }
 
     getStartExplanations() {
diff --git a/src/nodes/Spread.ts b/src/nodes/Spread.ts
index 1e8606faf..c8a6456b4 100644
--- a/src/nodes/Spread.ts
+++ b/src/nodes/Spread.ts
@@ -1,7 +1,6 @@
 import Expression from './Expression';
 import type { Grammar, Replacement } from './Node';
 import Token from './Token';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import type { BasisTypeName } from '../basis/BasisConstants';
@@ -10,6 +9,7 @@ import Sym from './Sym';
 import { BIND_SYMBOL } from '../parser/Symbols';
 import AnyType from './AnyType';
 import ListType from './ListType';
+import type Locales from '../locale/Locales';
 
 /** Inside a list literal, flattens values of a list value into a new list */
 export default class Spread extends Node {
@@ -43,7 +43,7 @@ export default class Spread extends Node {
                 name: 'list',
                 kind: optional(node(Expression)),
                 getType: () => ListType.make(new AnyType()),
-                label: (translation: Locale) => translation.term.list,
+                label: (locales: Locales) => locales.get((l) => l.term.list),
             },
         ];
     }
@@ -67,8 +67,8 @@ export default class Spread extends Node {
         return;
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.Spread;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Spread);
     }
 
     getGlyphs() {
diff --git a/src/nodes/StreamDefinition.ts b/src/nodes/StreamDefinition.ts
index 58343bb0b..86b42528b 100644
--- a/src/nodes/StreamDefinition.ts
+++ b/src/nodes/StreamDefinition.ts
@@ -38,6 +38,7 @@ import Evaluate from './Evaluate';
 import Reference from './Reference';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import DefinitionExpression from './DefinitionExpression';
+import type Locales from '../locale/Locales';
 
 export default class StreamDefinition extends DefinitionExpression {
     readonly docs?: Docs;
@@ -177,8 +178,8 @@ export default class StreamDefinition extends DefinitionExpression {
         return this.names.getPreferredNameString(locales);
     }
 
-    getReference(locales: Locale[] = []): Reference {
-        return Reference.make(this.getPreferredName(locales), this);
+    getReference(locales: Locales): Reference {
+        return Reference.make(locales.getName(this.names), this);
     }
 
     /**
@@ -250,12 +251,15 @@ export default class StreamDefinition extends DefinitionExpression {
         return definition === this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.StreamDefinition;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.StreamDefinition);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.StreamDefinition.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.StreamDefinition.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/StreamDefinitionType.ts b/src/nodes/StreamDefinitionType.ts
index 18c55a246..7984be687 100644
--- a/src/nodes/StreamDefinitionType.ts
+++ b/src/nodes/StreamDefinitionType.ts
@@ -6,6 +6,7 @@ import type StreamDefinition from './StreamDefinition';
 import Glyphs from '../lore/Glyphs';
 import { STREAM_SYMBOL } from '../parser/Symbols';
 import type Spaces from '../parser/Spaces';
+import type Locales from '../locale/Locales';
 
 export default class StreamDefinitionType extends Type {
     readonly definition: StreamDefinition;
@@ -54,8 +55,8 @@ export default class StreamDefinitionType extends Type {
         )}`;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.StreamDefinitionType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.StreamDefinitionType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/StreamType.ts b/src/nodes/StreamType.ts
index c3ab21a01..9e98cea1f 100644
--- a/src/nodes/StreamType.ts
+++ b/src/nodes/StreamType.ts
@@ -1,6 +1,5 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { STREAM_SYMBOL } from '@parser/Symbols';
-import type Locale from '@locale/Locale';
 import AnyType from './AnyType';
 import type Context from './Context';
 import { node, type Grammar, type Replacement } from './Node';
@@ -9,6 +8,7 @@ import Sym from './Sym';
 import Type from './Type';
 import type TypeSet from './TypeSet';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export const STREAM_NATIVE_TYPE_NAME = 'stream';
 
@@ -64,8 +64,8 @@ export default class StreamType extends Type {
         ) as this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.StreamType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.StreamType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/StructureDefinition.ts b/src/nodes/StructureDefinition.ts
index 6ea293e0d..28886ed12 100644
--- a/src/nodes/StructureDefinition.ts
+++ b/src/nodes/StructureDefinition.ts
@@ -40,6 +40,7 @@ import concretize from '../locale/concretize';
 import Evaluate from './Evaluate';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
 import DefinitionExpression from './DefinitionExpression';
+import type Locales from '../locale/Locales';
 
 export default class StructureDefinition extends DefinitionExpression {
     readonly docs: Docs | undefined;
@@ -195,12 +196,12 @@ export default class StructureDefinition extends DefinitionExpression {
         return true;
     }
 
-    getEvaluateTemplate(nameOrLocales: Locale[] | string) {
+    getEvaluateTemplate(nameOrLocales: Locales | string) {
         return Evaluate.make(
             Reference.make(
                 typeof nameOrLocales === 'string'
                     ? nameOrLocales
-                    : this.names.getPreferredNameString(nameOrLocales),
+                    : nameOrLocales.getName(this.names),
                 this
             ),
             this.inputs
@@ -240,11 +241,8 @@ export default class StructureDefinition extends DefinitionExpression {
         return new NameType(this.getNames()[0], undefined, this);
     }
 
-    getReference(locales: Locale[] = []): Reference {
-        return Reference.make(
-            this.names.getPreferredNameString(locales, true),
-            this
-        );
+    getReference(locales: Locales): Reference {
+        return Reference.make(locales.getName(this.names), this);
     }
 
     getAbstractFunctions(): FunctionDefinition[] {
@@ -478,16 +476,19 @@ export default class StructureDefinition extends DefinitionExpression {
         return definition === this;
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.StructureDefinition;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.StructureDefinition);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.StructureDefinition.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.StructureDefinition.start)
+        );
     }
 
-    getDescriptionInputs(locale: Locale) {
-        return [this.names.getPreferredNameString([locale])];
+    getDescriptionInputs(locales: Locales) {
+        return [locales.getName(this.names)];
     }
 
     getGlyphs() {
diff --git a/src/nodes/StructureType.ts b/src/nodes/StructureType.ts
index 8f0092915..78872453a 100644
--- a/src/nodes/StructureType.ts
+++ b/src/nodes/StructureType.ts
@@ -12,6 +12,7 @@ import Glyphs from '../lore/Glyphs';
 import type { Grammar } from './Node';
 import BasisType from './BasisType';
 import type Spaces from '../parser/Spaces';
+import type Locales from '../locale/Locales';
 
 export const STRUCTURE_NATIVE_TYPE_NAME = 'structure';
 
@@ -128,15 +129,15 @@ export default class StructureType extends BasisType {
         return this.structure.getPreferredName(locale ? [locale] : []);
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.StructureType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.StructureType);
     }
 
     getGlyphs() {
         return Glyphs.Type;
     }
 
-    getDescriptionInputs(locale: Locale) {
-        return [this.structure.names.getPreferredNameString(locale)];
+    getDescriptionInputs(locales: Locales) {
+        return [locales.getName(this.structure.names)];
     }
 }
diff --git a/src/nodes/TableLiteral.ts b/src/nodes/TableLiteral.ts
index 63a9be163..ebe5455aa 100644
--- a/src/nodes/TableLiteral.ts
+++ b/src/nodes/TableLiteral.ts
@@ -13,7 +13,6 @@ import Start from '@runtime/Start';
 import type Context from './Context';
 import type TypeSet from './TypeSet';
 import { node, type Grammar, type Replacement, list } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import concretize from '../locale/concretize';
@@ -23,6 +22,7 @@ import IncompatibleCellType from '../conflicts/IncompatibleCellType';
 import ExtraCell from '../conflicts/ExtraCell';
 import UnexpectedColumnBind from '../conflicts/UnexpectedColumnBind';
 import type Type from './Type';
+import type Locales from '../locale/Locales';
 
 export default class TableLiteral extends Expression {
     readonly type: TableType;
@@ -46,7 +46,7 @@ export default class TableLiteral extends Expression {
             {
                 name: 'type',
                 kind: node(TableType),
-                label: (translation: Locale) => translation.term.table,
+                label: (locales: Locales) => locales.get((l) => l.term.table),
             },
             { name: 'rows', kind: list(true, node(Row)) },
         ];
@@ -192,23 +192,26 @@ export default class TableLiteral extends Expression {
         return this.rows[this.rows.length - 1] ?? this.type;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TableLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TableLiteral);
     }
 
-    getStartExplanations(locale: Locale) {
-        return concretize(locale, locale.node.TableLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.TableLiteral.start)
+        );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.TableLiteral.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.TableLiteral.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/TableType.ts b/src/nodes/TableType.ts
index 0bb07bca1..4379e5d5b 100644
--- a/src/nodes/TableType.ts
+++ b/src/nodes/TableType.ts
@@ -9,7 +9,6 @@ import AnyType from './AnyType';
 import type Conflict from '@conflicts/Conflict';
 import ExpectedColumnType from '@conflicts/ExpectedColumnType';
 import { node, type Grammar, type Replacement, list } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import BasisType from './BasisType';
 import StructureDefinition from './StructureDefinition';
@@ -18,6 +17,7 @@ import type Reference from './Reference';
 import type Definition from './Definition';
 import type Type from './Type';
 import StructureType from './StructureType';
+import type Locales from '../locale/Locales';
 
 export default class TableType extends BasisType {
     readonly open: Token;
@@ -132,8 +132,8 @@ export default class TableType extends BasisType {
         return 'table';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TableType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TableType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/TextLiteral.test.ts b/src/nodes/TextLiteral.test.ts
index aeccbc4b5..c1d8077a6 100644
--- a/src/nodes/TextLiteral.test.ts
+++ b/src/nodes/TextLiteral.test.ts
@@ -3,6 +3,7 @@ import evaluateCode from '../runtime/evaluate';
 import type Locale from '../locale/Locale';
 import { readFileSync } from 'fs';
 import DefaultLocale from '../locale/DefaultLocale';
+import Locales from '../locale/Locales';
 
 /** Load a few locales for testing. */
 const en = DefaultLocale;
@@ -22,6 +23,6 @@ test.each([
     ['"hola"/es"hello"/en', '"hola"/es', [es, en]],
     ['"hola"/es"hello"/en', '"hello"/en', [en]],
 ])('%s -> %s', async (code, value, locales: Locale[]) => {
-    locales = locales.length === 0 ? [en] : locales;
-    expect(evaluateCode(code, [], locales)?.toWordplay(locales)).toBe(value);
+    const loc = new Locales(locales, DefaultLocale);
+    expect(evaluateCode(code, [], loc)?.toWordplay(loc)).toBe(value);
 });
diff --git a/src/nodes/TextLiteral.ts b/src/nodes/TextLiteral.ts
index 6b15162bd..47d5badd2 100644
--- a/src/nodes/TextLiteral.ts
+++ b/src/nodes/TextLiteral.ts
@@ -23,6 +23,7 @@ import Start from '@runtime/Start';
 import Finish from '@runtime/Finish';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
+import type Locales from '../locale/Locales';
 
 export default class TextLiteral extends Literal {
     /** The raw token in the program */
@@ -159,9 +160,9 @@ export default class TextLiteral extends Literal {
             : getPreferred(locales, this.texts);
     }
 
-    getValue(locales: Locale[]): TextValue {
+    getValue(locales: Locales): TextValue {
         // Get the alternatives
-        const best = this.getLocaleText(locales);
+        const best = this.getLocaleText(locales.getLocales());
         return new TextValue(
             this,
             best.getText(),
@@ -195,12 +196,15 @@ export default class TextLiteral extends Literal {
         return this.texts[0];
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TextLiteral;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TextLiteral);
     }
 
-    getStartExplanations(translation: Locale) {
-        return concretize(translation, translation.node.TextLiteral.start);
+    getStartExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.TextLiteral.start)
+        );
     }
 
     getGlyphs() {
diff --git a/src/nodes/TextType.ts b/src/nodes/TextType.ts
index 445c90ae7..551f4e638 100644
--- a/src/nodes/TextType.ts
+++ b/src/nodes/TextType.ts
@@ -1,6 +1,5 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { TEXT_SYMBOL } from '@parser/Symbols';
-import type Locale from '@locale/Locale';
 import Language from './Language';
 import BasisType from './BasisType';
 import { node, type Grammar, type Replacement, optional } from './Node';
@@ -12,6 +11,7 @@ import UnionType from './UnionType';
 import type Context from './Context';
 import type Type from './Type';
 import TextLiteral from './TextLiteral';
+import type Locales from '../locale/Locales';
 
 /** Any string or a specific string, depending on whether the given token is an empty text literal. */
 export default class TextType extends BasisType {
@@ -110,8 +110,8 @@ export default class TextType extends BasisType {
         return 'text';
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TextType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TextType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/This.ts b/src/nodes/This.ts
index d4e8dd687..0bbe3e227 100644
--- a/src/nodes/This.ts
+++ b/src/nodes/This.ts
@@ -20,7 +20,6 @@ import Reaction from './Reaction';
 import ValueException from '@values/ValueException';
 import { node, type Grammar, type Replacement } from './Node';
 import SimpleExpression from './SimpleExpression';
-import type Locale from '@locale/Locale';
 import { UnenclosedType } from './UnenclosedType';
 import Glyphs from '../lore/Glyphs';
 import { PROPERTY_SYMBOL } from '../parser/Symbols';
@@ -28,6 +27,7 @@ import Sym from './Sym';
 import concretize from '../locale/concretize';
 import type Node from './Node';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 type ThisStructure = StructureDefinition | ConversionDefinition | Reaction;
 
@@ -168,19 +168,19 @@ export default class This extends SimpleExpression {
         return this.dis;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.This;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.This);
     }
 
     getStartExplanations(
-        translation: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            translation,
-            translation.node.This.start,
-            this.getValueIfDefined(translation, context, evaluator)
+            locales,
+            locales.get((l) => l.node.This.start),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/Token.ts b/src/nodes/Token.ts
index 473efa7bd..bc1db6800 100644
--- a/src/nodes/Token.ts
+++ b/src/nodes/Token.ts
@@ -15,6 +15,7 @@ import {
 import type Definition from './Definition';
 import type Context from './Context';
 import type { TemplateInput } from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Token extends Node {
     /** The one or more types of token this might represent. This is narrowed during parsing to one.*/
@@ -55,8 +56,8 @@ export default class Token extends Node {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Token;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Token);
     }
 
     getPurpose() {
@@ -127,25 +128,25 @@ export default class Token extends Node {
     /**
      * Override node's
      * */
-    getLabel(translation: Locale): string {
-        return getTokenLabel(this, translation);
+    getLabel(locales: Locales): string {
+        return getTokenLabel(this, locales);
     }
 
     /** If this is a placeholder, determine a label for it. */
     getPlaceholder(
         root: Root,
         context: Context,
-        locale: Locale
+        locales: Locales
     ): Template | undefined {
         if (!this.isSymbol(Sym.Placeholder)) return undefined;
         const parent = root.getParent(this);
         return parent === undefined
             ? undefined
-            : parent.getChildPlaceholderLabel(this, locale, context, root);
+            : parent.getChildPlaceholderLabel(this, locales, context, root);
     }
 
-    getDescriptionInputs(locale: Locale): TemplateInput[] {
-        return [getTokenLabel(this, locale), this.getText()];
+    getDescriptionInputs(locales: Locales): TemplateInput[] {
+        return [getTokenLabel(this, locales), this.getText()];
     }
 
     localized(name: boolean, locales: Locale[], root: Root, context: Context) {
@@ -232,14 +233,14 @@ export default class Token extends Node {
     }
 }
 
-export function getTokenLabel(token: Node, translation: Locale): string {
-    if (!(token instanceof Token)) return token.getLabel(translation);
+export function getTokenLabel(token: Node, locales: Locales): string {
+    if (!(token instanceof Token)) return token.getLabel(locales);
 
     const tokenType = Object.entries(Sym).find(
         ([, val]) => val === token.types[0]
     );
     const tokenLabel = tokenType
-        ? translation.token[tokenType[0] as keyof typeof Sym]
+        ? locales.getLocale().token[tokenType[0] as keyof typeof Sym]
         : '';
     return tokenLabel;
 }
diff --git a/src/nodes/Translation.ts b/src/nodes/Translation.ts
index bf3eeca90..12f5c52a7 100644
--- a/src/nodes/Translation.ts
+++ b/src/nodes/Translation.ts
@@ -2,13 +2,13 @@ import Token from './Token';
 import Language from './Language';
 import Sym from './Sym';
 import { node, type Grammar, type Replacement, optional, list } from './Node';
-import type Locale from '@locale/Locale';
 import Emotion from '../lore/Emotion';
 import { TextCloseByTextOpen, TextDelimiters } from '../parser/Tokenizer';
 import Purpose from '../concepts/Purpose';
 import { LanguageTagged } from './LanguageTagged';
 import Example from './Example';
 import type Program from './Program';
+import type Locales from '../locale/Locales';
 
 export const ESCAPE_REGEX = /\\(.)/g;
 
@@ -82,8 +82,8 @@ export default class Translation extends LanguageTagged {
             .join('');
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Translation;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Translation);
     }
 
     getExpressions(): Program[] {
diff --git a/src/nodes/TypeInputs.ts b/src/nodes/TypeInputs.ts
index f23e9fd76..6d1b01b31 100644
--- a/src/nodes/TypeInputs.ts
+++ b/src/nodes/TypeInputs.ts
@@ -1,4 +1,3 @@
-import type Locale from '@locale/Locale';
 import Purpose from '../concepts/Purpose';
 import Glyphs from '../lore/Glyphs';
 import { TYPE_CLOSE_SYMBOL, TYPE_OPEN_SYMBOL } from '../parser/Symbols';
@@ -7,6 +6,7 @@ import Token from './Token';
 import Sym from './Sym';
 import Type from './Type';
 import Node, { list, node, optional } from './Node';
+import type Locales from '../locale/Locales';
 
 export default class TypeInputs extends Node {
     readonly open: Token;
@@ -59,8 +59,8 @@ export default class TypeInputs extends Node {
         return;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TypeInputs;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TypeInputs);
     }
 
     getGlyphs() {
diff --git a/src/nodes/TypePlaceholder.ts b/src/nodes/TypePlaceholder.ts
index 14d23f181..a71a497aa 100644
--- a/src/nodes/TypePlaceholder.ts
+++ b/src/nodes/TypePlaceholder.ts
@@ -5,9 +5,9 @@ import Type from './Type';
 import PlaceholderToken from './PlaceholderToken';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import Glyphs from '../lore/Glyphs';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export default class TypePlaceholder extends Type {
     readonly placeholder: Token;
@@ -33,7 +33,7 @@ export default class TypePlaceholder extends Type {
             {
                 name: 'placeholder',
                 kind: node(Sym.Placeholder),
-                label: (translation: Locale) => translation.term.type,
+                label: (locales: Locales) => locales.get((l) => l.term.type),
             },
         ];
     }
@@ -60,8 +60,8 @@ export default class TypePlaceholder extends Type {
         return true;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TypePlaceholder;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TypePlaceholder);
     }
 
     getGlyphs() {
diff --git a/src/nodes/TypeVariable.ts b/src/nodes/TypeVariable.ts
index 8980c3d57..5d616197c 100644
--- a/src/nodes/TypeVariable.ts
+++ b/src/nodes/TypeVariable.ts
@@ -10,6 +10,7 @@ import Sym from './Sym';
 import Token from './Token';
 import { TYPE_SYMBOL } from '../parser/Symbols';
 import type Definition from './Definition';
+import type Locales from '../locale/Locales';
 
 export default class TypeVariable extends Node {
     readonly names: Names;
@@ -87,8 +88,8 @@ export default class TypeVariable extends Node {
         return definition === this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TypeVariable;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TypeVariable);
     }
 
     getGlyphs() {
diff --git a/src/nodes/TypeVariables.ts b/src/nodes/TypeVariables.ts
index 22537691f..416b25ea8 100644
--- a/src/nodes/TypeVariables.ts
+++ b/src/nodes/TypeVariables.ts
@@ -5,11 +5,11 @@ import { TYPE_CLOSE_SYMBOL, TYPE_OPEN_SYMBOL } from '@parser/Symbols';
 import Names from './Names';
 import type TypeVariable from './TypeVariable';
 import type Conflict from '@conflicts/Conflict';
-import type Locale from '@locale/Locale';
 import DuplicateTypeVariable from '@conflicts/DuplicateTypeVariable';
 import Glyphs from '../lore/Glyphs';
 import Purpose from '../concepts/Purpose';
 import Node, { node } from './Node';
+import type Locales from '../locale/Locales';
 
 export default class TypeVariables extends Node {
     readonly open: Token;
@@ -84,8 +84,8 @@ export default class TypeVariables extends Node {
         return this.variables.some((variable) => variable.names.hasName(name));
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.TypeVariables;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.TypeVariables);
     }
 
     getGlyphs() {
diff --git a/src/nodes/UnaryEvaluate.ts b/src/nodes/UnaryEvaluate.ts
index 4b42ec7df..37cdd15f7 100644
--- a/src/nodes/UnaryEvaluate.ts
+++ b/src/nodes/UnaryEvaluate.ts
@@ -16,7 +16,6 @@ import getConcreteExpectedType from './Generics';
 import type Value from '@values/Value';
 import UnknownNameType from './UnknownNameType';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import StartEvaluation from '@runtime/StartEvaluation';
 import NodeRef from '@locale/NodeRef';
 import Emotion from '../lore/Emotion';
@@ -28,6 +27,7 @@ import concretize from '../locale/concretize';
 import Reference from './Reference';
 import type Node from './Node';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 export default class UnaryEvaluate extends Expression {
     readonly fun: Reference;
@@ -199,27 +199,27 @@ export default class UnaryEvaluate extends Expression {
         return this.fun;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.UnaryEvaluate;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.UnaryEvaluate);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.UnaryEvaluate.start,
-            new NodeRef(this.input, locale, context)
+            locales,
+            locales.get((l) => l.node.UnaryEvaluate.start),
+            new NodeRef(this.input, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.UnaryEvaluate.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.UnaryEvaluate.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/UnenclosedType.ts b/src/nodes/UnenclosedType.ts
index 1574c98b5..46742215c 100644
--- a/src/nodes/UnenclosedType.ts
+++ b/src/nodes/UnenclosedType.ts
@@ -1,14 +1,17 @@
 import UnknownType from './UnknownType';
 import type This from './This';
-import type Locale from '@locale/Locale';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export class UnenclosedType extends UnknownType<This> {
     constructor(dis: This) {
         super(dis, undefined);
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.NotEnclosedType.name);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.NotEnclosedType.name)
+        );
     }
 }
diff --git a/src/nodes/UnimplementedType.ts b/src/nodes/UnimplementedType.ts
index 95b802846..73d06b92f 100644
--- a/src/nodes/UnimplementedType.ts
+++ b/src/nodes/UnimplementedType.ts
@@ -1,14 +1,17 @@
 import UnknownType from './UnknownType';
 import type Expression from './Expression';
-import type Locale from '@locale/Locale';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class UnimplementedType extends UnknownType<Expression> {
     constructor(expression: Expression) {
         super(expression, undefined);
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.NotImplementedType.name);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.NotImplementedType.name)
+        );
     }
 }
diff --git a/src/nodes/UnionType.ts b/src/nodes/UnionType.ts
index b703023c0..42220b8d8 100644
--- a/src/nodes/UnionType.ts
+++ b/src/nodes/UnionType.ts
@@ -10,12 +10,12 @@ import type TypeSet from './TypeSet';
 import NeverType from './NeverType';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NoneType from './NoneType';
 import Glyphs from '../lore/Glyphs';
 import NodeRef from '../locale/NodeRef';
 import TypePlaceholder from './TypePlaceholder';
 import type Definition from './Definition';
+import type Locales from '../locale/Locales';
 
 export default class UnionType extends Type {
     readonly left: Type;
@@ -190,8 +190,8 @@ export default class UnionType extends Type {
               );
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.UnionType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.UnionType);
     }
 
     /**
@@ -233,10 +233,10 @@ export default class UnionType extends Type {
         return Glyphs.Union;
     }
 
-    getDescriptionInputs(locale: Locale, context: Context) {
+    getDescriptionInputs(locales: Locales, context: Context) {
         return [
-            new NodeRef(this.left, locale, context),
-            new NodeRef(this.right, locale, context),
+            new NodeRef(this.left, locales, context),
+            new NodeRef(this.right, locales, context),
         ];
     }
 
diff --git a/src/nodes/Unit.ts b/src/nodes/Unit.ts
index 38bd1972d..45b5765f4 100644
--- a/src/nodes/Unit.ts
+++ b/src/nodes/Unit.ts
@@ -9,7 +9,6 @@ import type { BasisTypeName } from '../basis/BasisConstants';
 import LanguageToken from './LanguageToken';
 import Sym from './Sym';
 import { node, type Grammar, type Replacement, list, optional } from './Node';
-import type Locale from '@locale/Locale';
 import Emotion from '../lore/Emotion';
 import type Context from './Context';
 import {
@@ -17,6 +16,7 @@ import {
     getPossibleUnits,
 } from '../edit/getPossibleUnits';
 import type Node from './Node';
+import type Locales from '../locale/Locales';
 
 export default class Unit extends Type {
     /** In case this was parsed, we keep the original tokens around. */
@@ -369,8 +369,8 @@ export default class Unit extends Type {
         return Unit.get(newExponents);
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Unit;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Unit);
     }
 
     getGlyphs() {
@@ -380,10 +380,10 @@ export default class Unit extends Type {
         };
     }
 
-    getDescriptionInputs(locale: Locale) {
+    getDescriptionInputs(locales: Locales) {
         return [
             this.exponents.size === 0
-                ? locale.basis.Number.name[0]
+                ? locales.get((l) => l.basis.Number.name[0])
                 : this.toWordplay(),
         ];
     }
diff --git a/src/nodes/UnknownNameType.ts b/src/nodes/UnknownNameType.ts
index 6b2cdb409..4dacf65e8 100644
--- a/src/nodes/UnknownNameType.ts
+++ b/src/nodes/UnknownNameType.ts
@@ -2,9 +2,9 @@ import UnknownType from './UnknownType';
 import type Token from './Token';
 import type Node from './Node';
 import type Type from './Type';
-import type Locale from '@locale/Locale';
 import type { TemplateInput } from '../locale/concretize';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class UnknownNameType extends UnknownType<Node> {
     readonly name: Token | undefined;
@@ -19,10 +19,10 @@ export default class UnknownNameType extends UnknownType<Node> {
         this.name = name;
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
+    getReason(concretize: Concretizer, locales: Locales) {
         return concretize(
-            locale,
-            locale.node.UnknownNameType.description,
+            locales,
+            locales.get((l) => l.node.UnknownNameType.description),
             ...this.getDescriptionInputs()
         );
     }
diff --git a/src/nodes/UnknownType.ts b/src/nodes/UnknownType.ts
index 28e2eaa3b..f9d7db155 100644
--- a/src/nodes/UnknownType.ts
+++ b/src/nodes/UnknownType.ts
@@ -1,5 +1,4 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Context from './Context';
 import type Node from './Node';
 import Type from './Type';
@@ -11,6 +10,7 @@ import type Concretizer from './Concretizer';
 import Paragraph, { type Segment } from './Paragraph';
 import Token from './Token';
 import Sym from './Sym';
+import type Locales from '../locale/Locales';
 
 export default abstract class UnknownType<
     ExpressionType extends Node
@@ -60,23 +60,26 @@ export default abstract class UnknownType<
 
     getDescription(
         concretizer: Concretizer,
-        locale: Locale,
+        locales: Locales,
         context: Context
     ): Markup {
         const reasons = this.getReasons().map((reason) =>
-            reason.getReason(concretizer, locale, context)
+            reason.getReason(concretizer, locales, context)
         );
         let spaces = undefined;
         let segments: Segment[] = [
             // Get the unknown type description
-            ...super.getDescription(concretizer, locale, context).paragraphs[0]
+            ...super.getDescription(concretizer, locales, context).paragraphs[0]
                 .segments,
         ];
         // Get all the reasons for the unknown types.
         for (const reason of reasons) {
             segments = [
                 ...segments,
-                new Token(locale.node.UnknownType.connector, Sym.Words),
+                new Token(
+                    locales.get((l) => l.node.UnknownType.connector),
+                    Sym.Words
+                ),
                 ...reason.paragraphs[0].segments,
             ];
             spaces =
@@ -91,13 +94,13 @@ export default abstract class UnknownType<
         return new Markup([new Paragraph(segments)], spaces);
     }
 
-    getNodeLocale(locale: Locale) {
-        return locale.node.UnknownType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.UnknownType);
     }
 
     abstract getReason(
         concretizer: Concretizer,
-        locale: Locale,
+        locales: Locales,
         context: Context
     ): Markup;
 
diff --git a/src/nodes/UnknownVariableType.ts b/src/nodes/UnknownVariableType.ts
index 591c7c980..b0cfea92c 100644
--- a/src/nodes/UnknownVariableType.ts
+++ b/src/nodes/UnknownVariableType.ts
@@ -1,14 +1,17 @@
 import UnknownType from './UnknownType';
 import type { EvaluationType } from './Generics';
-import type Locale from '@locale/Locale';
 import type Concretizer from './Concretizer';
+import type Locales from '../locale/Locales';
 
 export class UnknownVariableType extends UnknownType<EvaluationType> {
     constructor(evaluate: EvaluationType) {
         super(evaluate, undefined);
     }
 
-    getReason(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.node.UnknownVariableType.name);
+    getReason(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.UnknownVariableType.name)
+        );
     }
 }
diff --git a/src/nodes/UnparsableExpression.ts b/src/nodes/UnparsableExpression.ts
index efbc7a170..9b4dd9cf6 100644
--- a/src/nodes/UnparsableExpression.ts
+++ b/src/nodes/UnparsableExpression.ts
@@ -10,11 +10,11 @@ import type Expression from './Expression';
 import Node, { node, type Grammar, type Replacement, list } from './Node';
 import type TypeSet from './TypeSet';
 import UnparsableType from './UnparsableType';
-import type Locale from '@locale/Locale';
 import SimpleExpression from './SimpleExpression';
 import Glyphs from '../lore/Glyphs';
 import concretize from '../locale/concretize';
 import Purpose from '../concepts/Purpose';
+import type Locales from '../locale/Locales';
 
 export default class UnparsableExpression extends SimpleExpression {
     readonly unparsables: Node[];
@@ -77,14 +77,14 @@ export default class UnparsableExpression extends SimpleExpression {
         return this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.UnparsableExpression;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.UnparsableExpression);
     }
 
-    getStartExplanations(translation: Locale) {
+    getStartExplanations(locales: Locales) {
         return concretize(
-            translation,
-            translation.node.UnparsableExpression.start
+            locales,
+            locales.get((l) => l.node.UnparsableExpression.start)
         );
     }
 
diff --git a/src/nodes/UnparsableType.ts b/src/nodes/UnparsableType.ts
index 181226588..9e3b15d26 100644
--- a/src/nodes/UnparsableType.ts
+++ b/src/nodes/UnparsableType.ts
@@ -1,10 +1,10 @@
 import type Conflict from '@conflicts/Conflict';
 import { UnparsableConflict } from '@conflicts/UnparsableConflict';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import Node, { list, type Grammar, type Replacement, node } from './Node';
 import Type from './Type';
 import Glyphs from '../lore/Glyphs';
+import type Locales from '../locale/Locales';
 
 export default class UnparsableType extends Type {
     readonly unparsables: Node[];
@@ -37,8 +37,8 @@ export default class UnparsableType extends Type {
         ) as this;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.UnparsableType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.UnparsableType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Update.test.ts b/src/nodes/Update.test.ts
index 321f7e7f6..6eca2b668 100644
--- a/src/nodes/Update.test.ts
+++ b/src/nodes/Update.test.ts
@@ -6,6 +6,7 @@ import ExpectedColumnBind from '@conflicts/ExpectedColumnBind';
 import Update from './Update';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
 import evaluateCode from '../runtime/evaluate';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([
     [
@@ -47,5 +48,5 @@ test.each([
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡3 4⎦ ⎡: a: 2 ⎦ a < 2', '⎡ 2 2 ⎦\n⎡ 3 4 ⎦'],
     ['⎡a•# b•#⎦⎡1 2⎦ ⎡3 4⎦ ⎡: a: 2 b: b + 1 ⎦ a < 2', '⎡ 2 3 ⎦\n⎡ 3 4 ⎦'],
 ])('%s = %s', (code: string, value: string) => {
-    expect(evaluateCode(code)?.toWordplay([])).toBe(value);
+    expect(evaluateCode(code)?.toWordplay(DefaultLocales)).toBe(value);
 });
diff --git a/src/nodes/Update.ts b/src/nodes/Update.ts
index c16bfbd6f..1c00386a0 100644
--- a/src/nodes/Update.ts
+++ b/src/nodes/Update.ts
@@ -17,7 +17,6 @@ import type Definition from './Definition';
 import type TypeSet from './TypeSet';
 import type Evaluator from '@runtime/Evaluator';
 import { node, type Grammar, type Replacement } from './Node';
-import type Locale from '@locale/Locale';
 import NodeRef from '@locale/NodeRef';
 import Glyphs from '../lore/Glyphs';
 import IncompatibleInput from '../conflicts/IncompatibleInput';
@@ -39,6 +38,7 @@ import Token from './Token';
 import { TABLE_CLOSE_SYMBOL, UPDATE_SYMBOL } from '../parser/Symbols';
 import Sym from './Sym';
 import ExpressionPlaceholder from './ExpressionPlaceholder';
+import type Locales from '../locale/Locales';
 
 type UpdateState = { table: TableValue; index: number; rows: StructureValue[] };
 
@@ -74,18 +74,18 @@ export default class Update extends Expression {
             {
                 name: 'table',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.table,
+                label: (locales: Locales) => locales.get((l) => l.term.table),
             },
             {
                 name: 'row',
                 kind: node(Row),
-                label: (translation: Locale) => translation.term.row,
+                label: (locales: Locales) => locales.get((l) => l.term.row),
                 space: true,
             },
             {
                 name: 'query',
                 kind: node(Expression),
-                label: (translation: Locale) => translation.term.query,
+                label: (locales: Locales) => locales.get((l) => l.term.query),
                 space: true,
             },
         ];
@@ -378,27 +378,27 @@ export default class Update extends Expression {
         return this.row.close ?? this.row.open;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Update;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Update);
     }
 
-    getStartExplanations(locale: Locale, context: Context) {
+    getStartExplanations(locales: Locales, context: Context) {
         return concretize(
-            locale,
-            locale.node.Update.start,
-            new NodeRef(this.table, locale, context)
+            locales,
+            locales.get((l) => l.node.Update.start),
+            new NodeRef(this.table, locales, context)
         );
     }
 
     getFinishExplanations(
-        locale: Locale,
+        locales: Locales,
         context: Context,
         evaluator: Evaluator
     ) {
         return concretize(
-            locale,
-            locale.node.Update.finish,
-            this.getValueIfDefined(locale, context, evaluator)
+            locales,
+            locales.get((l) => l.node.Update.finish),
+            this.getValueIfDefined(locales, context, evaluator)
         );
     }
 
diff --git a/src/nodes/VariableType.ts b/src/nodes/VariableType.ts
index f0ce79066..9c1eeb5ec 100644
--- a/src/nodes/VariableType.ts
+++ b/src/nodes/VariableType.ts
@@ -1,9 +1,9 @@
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import Type from './Type';
 import type TypeVariable from './TypeVariable';
 import Glyphs from '../lore/Glyphs';
 import type { Grammar } from './Node';
+import type Locales from '../locale/Locales';
 
 export default class VariableType extends Type {
     readonly definition: TypeVariable;
@@ -54,8 +54,8 @@ export default class VariableType extends Type {
         return this.definition.toWordplay();
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.VariableType;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.VariableType);
     }
 
     getGlyphs() {
diff --git a/src/nodes/WebLink.ts b/src/nodes/WebLink.ts
index 1ab66f9bb..cdaf16764 100644
--- a/src/nodes/WebLink.ts
+++ b/src/nodes/WebLink.ts
@@ -1,5 +1,4 @@
 import type Conflict from '@conflicts/Conflict';
-import type Locale from '@locale/Locale';
 import Purpose from '../concepts/Purpose';
 import Glyphs from '../lore/Glyphs';
 import {
@@ -12,6 +11,7 @@ import Token from './Token';
 import Sym from './Sym';
 import type { TemplateInput } from '../locale/concretize';
 import Content from './Content';
+import type Locales from '../locale/Locales';
 
 export default class WebLink extends Content {
     readonly open: Token;
@@ -78,8 +78,8 @@ export default class WebLink extends Content {
         return Purpose.Document;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.WebLink;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.WebLink);
     }
 
     getGlyphs() {
diff --git a/src/nodes/Words.ts b/src/nodes/Words.ts
index ba3dd1e30..233d22a13 100644
--- a/src/nodes/Words.ts
+++ b/src/nodes/Words.ts
@@ -1,5 +1,4 @@
 import type Conflict from '@conflicts/Conflict';
-import type Locale from '@locale/Locale';
 import Purpose from '../concepts/Purpose';
 import Glyphs from '../lore/Glyphs';
 import { node, type Grammar, type Replacement, any, none, list } from './Node';
@@ -19,6 +18,7 @@ import Node from './Node';
 import type { FontWeight } from '../basis/Fonts';
 import Mention from './Mention';
 import Branch from './Branch';
+import type Locales from '../locale/Locales';
 
 export type Format = 'italic' | 'underline' | 'light' | 'bold' | 'extra';
 
@@ -103,8 +103,8 @@ export default class Words extends Content {
         return Purpose.Document;
     }
 
-    getNodeLocale(translation: Locale) {
-        return translation.node.Words;
+    getNodeLocale(locales: Locales) {
+        return locales.get((l) => l.node.Words);
     }
 
     getFormat(): Format | undefined {
@@ -144,7 +144,7 @@ export default class Words extends Content {
     }
 
     concretize(
-        locale: Locale,
+        locales: Locales,
         inputs: TemplateInput[],
         replacements: [Node, Node][]
     ): Words | undefined {
@@ -160,7 +160,7 @@ export default class Words extends Content {
                     replacements.push([content, replacement]);
                     return replacement;
                 } else return content;
-            } else return content.concretize(locale, inputs, replacements);
+            } else return content.concretize(locales, inputs, replacements);
         });
         return concrete.some((s) => s === undefined)
             ? undefined
diff --git a/src/output/Arrangement.ts b/src/output/Arrangement.ts
index 2d70b9bba..c7f475d76 100644
--- a/src/output/Arrangement.ts
+++ b/src/output/Arrangement.ts
@@ -6,9 +6,9 @@ import Valued from './Valued';
 import type RenderContext from './RenderContext';
 import type Place from './Place';
 import type Output from './Output';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
-export function createArrangementType(locales: Locale[]) {
+export function createArrangementType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Arrangement, TYPE_SYMBOL)}()
 `);
@@ -35,6 +35,6 @@ export default abstract class Arrangement extends Valued {
 
     abstract getDescription(
         output: (Output | null)[],
-        locales: Locale[]
+        locales: Locales
     ): string;
 }
diff --git a/src/output/Color.ts b/src/output/Color.ts
index 51a0f8f41..4cc556165 100644
--- a/src/output/Color.ts
+++ b/src/output/Color.ts
@@ -10,11 +10,11 @@ import Evaluate from '../nodes/Evaluate';
 import NumberLiteral from '../nodes/NumberLiteral';
 import Reference from '../nodes/Reference';
 import Unit from '../nodes/Unit';
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import StructureValue from '../values/StructureValue';
+import type Locales from '../locale/Locales';
 
-export function createColorType(locales: Locale[]) {
+export function createColorType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Color, TYPE_SYMBOL)}(
         ${getBind(locales, (locale) => locale.output.Color.lightness)}•%
@@ -76,17 +76,14 @@ export default class Color extends Valued {
 
 export function createColorLiteral(
     project: Project,
-    locales: Locale[],
+    locales: Locales,
     lightness: number,
     chroma: number,
     hue: number
 ) {
     const ColorType = project.shares.output.Color;
     return Evaluate.make(
-        Reference.make(
-            ColorType.names.getPreferredNameString(locales),
-            ColorType
-        ),
+        Reference.make(locales.getName(ColorType.names), ColorType),
         [
             NumberLiteral.make(lightness),
             NumberLiteral.make(chroma),
diff --git a/src/output/DefaultSequences.ts b/src/output/DefaultSequences.ts
index 2b43a13b6..a333451cb 100644
--- a/src/output/DefaultSequences.ts
+++ b/src/output/DefaultSequences.ts
@@ -5,11 +5,11 @@ import NumberType from '../nodes/NumberType';
 import Unit from '../nodes/Unit';
 import { getDocLocales } from '../locale/getDocLocales';
 import { getNameLocales } from '../locale/getNameLocales';
-import type Locale from '../locale/Locale';
 import { toTokens } from '../parser/toTokens';
 import parseExpression from '../parser/parseExpression';
+import type Locales from '../locale/Locales';
 
-export function createSway(locales: Locale[]) {
+export function createSway(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.sway.doc),
         getNameLocales(locales, (locale) => locale.output.sequence.sway.names),
@@ -38,7 +38,7 @@ export function createSway(locales: Locale[]) {
     );
 }
 
-export function createBounce(locales: Locale[]) {
+export function createBounce(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.bounce.doc),
         getNameLocales(
@@ -74,7 +74,7 @@ export function createBounce(locales: Locale[]) {
     );
 }
 
-export function createSpin(locales: Locale[]) {
+export function createSpin(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.spin.doc),
         getNameLocales(locales, (locale) => locale.output.sequence.spin.names),
@@ -89,7 +89,7 @@ export function createSpin(locales: Locale[]) {
     );
 }
 
-export function createFadeIn(locales: Locale[]) {
+export function createFadeIn(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.fadein.doc),
         getNameLocales(
@@ -107,7 +107,7 @@ export function createFadeIn(locales: Locale[]) {
     );
 }
 
-export function createPopup(locales: Locale[]) {
+export function createPopup(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.popup.doc),
         getNameLocales(locales, (locale) => locale.output.sequence.popup.names),
@@ -124,7 +124,7 @@ export function createPopup(locales: Locale[]) {
     );
 }
 
-export function createShake(locales: Locale[]) {
+export function createShake(locales: Locales) {
     return FunctionDefinition.make(
         getDocLocales(locales, (locale) => locale.output.sequence.shake.doc),
         getNameLocales(locales, (locale) => locale.output.sequence.shake.names),
@@ -142,7 +142,7 @@ export function createShake(locales: Locale[]) {
     );
 }
 
-export function getDefaultSequences(locales: Locale[]) {
+export function getDefaultSequences(locales: Locales) {
     return {
         sway: createSway(locales),
         bounce: createBounce(locales),
diff --git a/src/output/Direction.ts b/src/output/Direction.ts
index 72f00311d..b2bb7f01a 100644
--- a/src/output/Direction.ts
+++ b/src/output/Direction.ts
@@ -7,9 +7,9 @@ import NumberValue from '@values/NumberValue';
 import type { EvaluationNode } from '@runtime/Evaluation';
 import StructureValue from '../values/StructureValue';
 import Unit from '../nodes/Unit';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
-export function createDirectionType(locales: Locale[]) {
+export function createDirectionType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.input.Direction, '•')}(
         ${getBind(locales, (locale) => locale.input.Direction.x)}•#m
diff --git a/src/output/Form.ts b/src/output/Form.ts
index bff012edb..8a11c5661 100644
--- a/src/output/Form.ts
+++ b/src/output/Form.ts
@@ -1,5 +1,5 @@
-import type Locale from '../locale/Locale';
 import { getFirstName } from '../locale/Locale';
+import type Locales from '../locale/Locales';
 import StructureValue from '../values/StructureValue';
 import type Value from '../values/Value';
 import { toNumber } from './Stage';
@@ -15,9 +15,9 @@ export abstract class Form extends Valued {
     abstract getZ(): number;
     abstract getWidth(): number;
     abstract getHeight(): number;
-    abstract getDescription(locales: Locale[]): string;
+    abstract getDescription(locales: Locales): string;
 
-    getShortDescription(locales: Locale[]) {
+    getShortDescription(locales: Locales) {
         return this.getDescription(locales);
     }
 
@@ -100,8 +100,8 @@ export class Rectangle extends Form {
         } L ${right - minX} ${bottom - minY} L ${right - minX} ${top - minY} Z`;
     }
 
-    getDescription(locales: Locale[]): string {
-        return getFirstName(locales[0].output.Rectangle.names);
+    getDescription(locales: Locales): string {
+        return locales.get((l) => getFirstName(l.output.Rectangle.names));
     }
 }
 
diff --git a/src/output/Free.ts b/src/output/Free.ts
index 9dac147f4..d06378608 100644
--- a/src/output/Free.ts
+++ b/src/output/Free.ts
@@ -8,9 +8,9 @@ import { getBind } from '@locale/getBind';
 import Arrangement from './Arrangement';
 import Phrase from './Phrase';
 import concretize from '../locale/concretize';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
-export function createFreeType(locales: Locale[]) {
+export function createFreeType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Free, '•')} Arrangement()
 `);
@@ -62,10 +62,10 @@ export class Free extends Arrangement {
         return undefined;
     }
 
-    getDescription(output: Output[], locales: Locale[]) {
+    getDescription(output: Output[], locales: Locales) {
         return concretize(
-            locales[0],
-            locales[0].output.Free.description,
+            locales,
+            locales.get((l) => l.output.Free.description),
             output.length
         ).toText();
     }
diff --git a/src/output/Grid.ts b/src/output/Grid.ts
index c4858a9a8..00291ce55 100644
--- a/src/output/Grid.ts
+++ b/src/output/Grid.ts
@@ -9,11 +9,11 @@ import NumberValue from '@values/NumberValue';
 import Place from './Place';
 import NoneValue from '@values/NoneValue';
 import concretize from '../locale/concretize';
-import type Locale from '../locale/Locale';
 import { getOutputInputs } from './Valued';
 import StructureValue from '../values/StructureValue';
+import type Locales from '../locale/Locales';
 
-export function createGridType(locales: Locale[]) {
+export function createGridType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Grid, '•')} Arrangement(
         ${getBind(locales, (locale) => locale.output.Grid.rows)}•#|ø:ø
@@ -184,10 +184,10 @@ export class Grid extends Arrangement {
         return undefined;
     }
 
-    getDescription(_: Output[], locales: Locale[]) {
+    getDescription(_: Output[], locales: Locales) {
         return concretize(
-            locales[0],
-            locales[0].output.Grid.description,
+            locales,
+            locales.get((l) => l.output.Grid.description),
             this.rows,
             this.columns
         ).toText();
diff --git a/src/output/Group.ts b/src/output/Group.ts
index 03364f6db..ad4090683 100644
--- a/src/output/Group.ts
+++ b/src/output/Group.ts
@@ -12,17 +12,17 @@ import Output, { DefaultStyle } from './Output';
 import { getTypeStyle, toArrangement, toOutputList } from './toOutput';
 import { TYPE_SYMBOL } from '../parser/Symbols';
 import type { NameGenerator } from './Stage';
-import type Locale from '../locale/Locale';
 import type { DefinitePose } from './Pose';
 import StructureValue from '@values/StructureValue';
 import { getOutputInput } from './Valued';
 import concretize from '../locale/concretize';
 import { SupportedFontsFamiliesType, type SupportedFace } from '../basis/Fonts';
-import { getFirstName } from '../locale/Locale';
 import Matter, { toMatter } from './Matter';
 import type Evaluator from '../runtime/Evaluator';
+import type Locales from '../locale/Locales';
+import { getFirstName } from '../locale/Locale';
 
-export function createGroupType(locales: Locale[]) {
+export function createGroupType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Group, TYPE_SYMBOL)} Output(
         ${getBind(locales, (locale) => locale.output.Group.layout)}•Arrangement
@@ -52,6 +52,7 @@ export function createGroupType(locales: Locale[]) {
     ${getBind(locales, (locale) => locale.output.Group.exiting)}•ø|🤪|💃: ø
     ${getBind(locales, (locale) => locale.output.Group.duration)}•#s: 0.25s
     ${getBind(locales, (locale) => locale.output.Group.style)}•${locales
+        .getLocales()
         .map((locale) =>
             Object.values(locale.output.Easing).map((id) => `"${id}"`)
         )
@@ -142,17 +143,17 @@ export default class Group extends Output {
         throw new Error('Method not implemented.');
     }
 
-    getShortDescription(locales: Locale[]) {
+    getShortDescription(locales: Locales) {
         return this.name instanceof TextLang
             ? this.name.text
-            : getFirstName(locales[0].output.Group.names);
+            : locales.get((l) => getFirstName(l.output.Group.names));
     }
 
-    getDescription(locales: Locale[]) {
+    getDescription(locales: Locales) {
         if (this._description === undefined) {
             this._description = concretize(
-                locales[0],
-                locales[0].output.Group.description,
+                locales,
+                locales.get((l) => l.output.Group.description),
                 this.name instanceof TextLang ? this.name.text : undefined,
                 this.layout.getDescription(this.content, locales),
                 this.pose.getDescription(locales)
diff --git a/src/output/Matter.ts b/src/output/Matter.ts
index c8f9b40f0..ac66b51dc 100644
--- a/src/output/Matter.ts
+++ b/src/output/Matter.ts
@@ -4,12 +4,12 @@ import { getBind } from '@locale/getBind';
 import Valued, { getOutputInputs } from './Valued';
 import { toBoolean, toNumber } from './Stage';
 import StructureValue from '../values/StructureValue';
-import type Locale from '../locale/Locale';
 import { TRUE_SYMBOL } from '../parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export const DefaultBounciness = 0.5;
 
-export function createMatterType(locales: Locale[]) {
+export function createMatterType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Matter, '•')}(
         ${getBind(locales, (locale) => locale.output.Matter.mass)}•#kg: 1kg
diff --git a/src/output/Output.ts b/src/output/Output.ts
index 2157f37ad..89e031911 100644
--- a/src/output/Output.ts
+++ b/src/output/Output.ts
@@ -11,9 +11,9 @@ import type Pose from './Pose';
 import type { DefinitePose } from './Pose';
 import type RenderContext from './RenderContext';
 import Fonts, { type SupportedFace } from '../basis/Fonts';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
-export function createOutputType(locales: Locale[]) {
+export function createOutputType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Output, TYPE_SYMBOL)}()
 `);
@@ -87,8 +87,8 @@ export default abstract class Output extends Valued {
 
     abstract getOutput(): (Output | null)[];
     abstract getBackground(): Color | undefined;
-    abstract getShortDescription(locales: Locale[]): string;
-    abstract getDescription(locales: Locale[]): string;
+    abstract getShortDescription(locales: Locales): string;
+    abstract getDescription(locales: Locales): string;
 
     /* 
     Given a predict function that takes a type input, recursively scans
diff --git a/src/output/OutputAnimation.ts b/src/output/OutputAnimation.ts
index 5dacf9a48..4d29a00bd 100644
--- a/src/output/OutputAnimation.ts
+++ b/src/output/OutputAnimation.ts
@@ -10,6 +10,7 @@ import Stage from './Stage';
 import type RenderContext from './RenderContext';
 import Phrase from './Phrase';
 import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 enum State {
     Entering = 'entering',
@@ -569,12 +570,12 @@ const StyleToCSSMapping = {
 // A cache of values to keys for each locale.
 const styleValueToKeyByLocale: Map<Locale, Map<string, string>> = new Map();
 
-function styleToCSSEasing(locales: Locale[], name: string | undefined) {
+function styleToCSSEasing(locales: Locales, name: string | undefined) {
     // No name given? Default to ease out.
     if (name === undefined) return 'ease-out';
 
     // Get the Easing dictionary from each locale, flatten into a list of key value pairs, and find the name with the matching value.
-    for (const locale of locales) {
+    for (const locale of locales.getLocales()) {
         const key = getStyleValueToKey(locale).get(name);
         if (key)
             return StyleToCSSMapping[key as keyof typeof StyleToCSSMapping];
diff --git a/src/output/Phrase.ts b/src/output/Phrase.ts
index df128cd5e..7733b15b9 100644
--- a/src/output/Phrase.ts
+++ b/src/output/Phrase.ts
@@ -18,7 +18,6 @@ import type Sequence from './Sequence';
 import { PX_PER_METER, sizeToPx } from './outputToCSS';
 import { getBind } from '@locale/getBind';
 import { CSSFallbackFaces, toNumber, type NameGenerator } from './Stage';
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import type { DefinitePose } from './Pose';
 import StructureValue from '../values/StructureValue';
@@ -30,8 +29,9 @@ import type Markup from '../nodes/Markup';
 import segmentWraps from './segmentWraps';
 import type Matter from './Matter';
 import { toMatter } from './Matter';
+import type Locales from '../locale/Locales';
 
-export function createPhraseType(locales: Locale[]) {
+export function createPhraseType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Phrase, '•')} Output(
         ${getBind(locales, (locale) => locale.output.Phrase.text)}•""|[""]|\`…\`
@@ -69,6 +69,7 @@ export function createPhraseType(locales: Locale[]) {
         ${getBind(locales, (locale) => locale.output.Phrase.exiting)}•ø|🤪|💃: ø
         ${getBind(locales, (locale) => locale.output.Phrase.duration)}•#s: 0.25s
         ${getBind(locales, (locale) => locale.output.Phrase.style)}•${locales
+        .getLocales()
         .map((locale) =>
             Object.values(locale.output.Easing).map((id) => `"${id}"`)
         )
@@ -294,7 +295,7 @@ export default class Phrase extends Output {
         return undefined;
     }
 
-    getLocalizedTextOrDoc(locales: Locale[]): TextLang | Markup {
+    getLocalizedTextOrDoc(locales: Locales): TextLang | Markup {
         // Get the list of text lang and doc and find the one with the best matching language.
         if (Array.isArray(this.text)) {
             const options = this.text;
@@ -302,6 +303,7 @@ export default class Phrase extends Output {
             // first match. If no match, default to the first text.
             return (
                 locales
+                    .getLocales()
                     .map((locale) =>
                         options.find((text) => locale.language === text.lang)
                     )
@@ -312,20 +314,20 @@ export default class Phrase extends Output {
         } else return this.text.markup;
     }
 
-    getShortDescription(locales: Locale[]) {
+    getShortDescription(locales: Locales) {
         const textOrDoc = this.getLocalizedTextOrDoc(locales);
         return textOrDoc instanceof TextLang
             ? textOrDoc.text
             : textOrDoc?.toText() ?? '';
     }
 
-    getDescription(locales: Locale[]) {
+    getDescription(locales: Locales) {
         if (this._description === undefined) {
             const text = this.getShortDescription(locales);
 
             this._description = concretize(
-                locales[0],
-                locales[0].output.Phrase.description,
+                locales,
+                locales.get((l) => l.output.Phrase.description),
                 text,
                 this.name instanceof TextLang ? this.name.text : undefined,
                 this.size,
diff --git a/src/output/Place.ts b/src/output/Place.ts
index 296e827e3..b9c0c4482 100644
--- a/src/output/Place.ts
+++ b/src/output/Place.ts
@@ -9,10 +9,10 @@ import NumberValue from '@values/NumberValue';
 import Evaluation from '@runtime/Evaluation';
 import StructureValue from '../values/StructureValue';
 import Unit from '../nodes/Unit';
-import type Locale from '../locale/Locale';
 import NoneValue from '../values/NoneValue';
+import type Locales from '../locale/Locales';
 
-export function createPlaceType(locales: Locale[]) {
+export function createPlaceType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Place, '•')}(
         ${getBind(locales, (locale) => locale.output.Place.x)}•#m: 0m
diff --git a/src/output/Pose.ts b/src/output/Pose.ts
index 0656c9192..d8df1d619 100644
--- a/src/output/Pose.ts
+++ b/src/output/Pose.ts
@@ -10,11 +10,11 @@ import { toColor } from './Color';
 import { getBind } from '@locale/getBind';
 import Evaluate from '@nodes/Evaluate';
 import Reference from '@nodes/Reference';
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
-export function createPoseType(locales: Locale[]) {
+export function createPoseType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Pose, '•')}(
         ${getBind(locales, (locale) => locale.output.Pose.color)}•Color|ø: ø
@@ -74,11 +74,11 @@ export default class Pose extends Valued {
         );
     }
 
-    getDescription(locales: Locale[]) {
+    getDescription(locales: Locales) {
         if (this._description === undefined) {
             this._description = concretize(
-                locales[0],
-                locales[0].output.Pose.description,
+                locales,
+                locales.get((l) => l.output.Pose.description),
                 this.opacity !== undefined && this.opacity !== 1
                     ? Math.round(this.opacity)
                     : undefined,
@@ -157,13 +157,10 @@ export function toPose(
     );
 }
 
-export function createPoseLiteral(project: Project, locales: Locale[]) {
+export function createPoseLiteral(project: Project, locales: Locales) {
     const PoseType = project.shares.output.Pose;
     return Evaluate.make(
-        Reference.make(
-            PoseType.names.getPreferredNameString(locales),
-            PoseType
-        ),
+        Reference.make(locales.getName(PoseType.names), PoseType),
         []
     );
 }
diff --git a/src/output/Rebound.ts b/src/output/Rebound.ts
index d08708223..9d1787a78 100644
--- a/src/output/Rebound.ts
+++ b/src/output/Rebound.ts
@@ -3,11 +3,11 @@ import { getBind } from '@locale/getBind';
 import type Evaluator from '@runtime/Evaluator';
 import type { EvaluationNode } from '@runtime/Evaluation';
 import StructureValue from '../values/StructureValue';
-import type Locale from '../locale/Locale';
 import { createDirectionStructure } from './Direction';
 import TextValue from '../values/TextValue';
+import type Locales from '../locale/Locales';
 
-export function createReboundType(locales: Locale[]) {
+export function createReboundType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.input.Rebound, '•')}(
         ${getBind(locales, (locale) => locale.input.Rebound.subject)}•''
diff --git a/src/output/RenderContext.ts b/src/output/RenderContext.ts
index 52d02373a..075531944 100644
--- a/src/output/RenderContext.ts
+++ b/src/output/RenderContext.ts
@@ -1,18 +1,18 @@
 import type { SupportedFace } from '../basis/Fonts';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class RenderContext {
     /** A single typeface name with no text delimiters */
     readonly face: SupportedFace;
     readonly size: number;
-    readonly locales: Locale[];
+    readonly locales: Locales;
     readonly fonts: Set<SupportedFace>;
     readonly animationFactor: number;
 
     constructor(
         face: SupportedFace,
         size: number,
-        locales: Locale[],
+        locales: Locales,
         fonts: Set<SupportedFace>,
         animationFactor: number
     ) {
diff --git a/src/output/Row.ts b/src/output/Row.ts
index e61f17401..f75df607f 100644
--- a/src/output/Row.ts
+++ b/src/output/Row.ts
@@ -10,11 +10,11 @@ import Arrangement from './Arrangement';
 import Group from './Group';
 import Phrase from './Phrase';
 import concretize from '../locale/concretize';
-import type Locale from '../locale/Locale';
 import { getOutputInput } from './Valued';
 import StructureValue from '../values/StructureValue';
+import type Locales from '../locale/Locales';
 
-export function createRowType(locales: Locale[]) {
+export function createRowType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Row, '•')} Arrangement(
         ${getBind(locales, (locale) => locale.output.Row.alignment)}•-1|0|1: 0
@@ -111,10 +111,10 @@ export class Row extends Arrangement {
         return undefined;
     }
 
-    getDescription(output: Output[], locales: Locale[]) {
+    getDescription(output: Output[], locales: Locales) {
         return concretize(
-            locales[0],
-            locales[0].output.Row.description,
+            locales,
+            locales.get((l) => l.output.Row.description),
             output.length,
             output.filter((o) => o instanceof Phrase).length,
             output.filter((o) => o instanceof Group).length
diff --git a/src/output/Sequence.ts b/src/output/Sequence.ts
index 9e5acaae9..23b66ba90 100644
--- a/src/output/Sequence.ts
+++ b/src/output/Sequence.ts
@@ -13,12 +13,12 @@ import NumberValue from '@values/NumberValue';
 import Transition from './Transition';
 import type Place from './Place';
 import type { TransitionSequence } from './OutputAnimation';
-import type Locale from '../locale/Locale';
 import type Project from '../models/Project';
+import type Locales from '../locale/Locales';
 
 const MaxCount = 5;
 
-export function createSequenceType(locales: Locale[]) {
+export function createSequenceType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Sequence, TYPE_SYMBOL)}(
         ${getBind(
@@ -30,11 +30,14 @@ export function createSequenceType(locales: Locale[]) {
             (locale) => locale.output.Sequence.duration
         )}•#s: 0.25s
         ${getBind(locales, (locale) => locale.output.Sequence.style)}•${locales
+        .getLocales()
         .map((locale) =>
             Object.values(locale.output.Easing).map((id) => `"${id}"`)
         )
         .flat()
-        .join('|')}: "${Object.values(locales[0].output.Easing)[0]}"
+        .join('|')}: "${
+        Object.values(locales.getLocales()[0].output.Easing)[0]
+    }"
         ${getBind(locales, (locale) => locale.output.Sequence.count)}•${[
         ...Array(MaxCount + 1).keys(),
     ]
diff --git a/src/output/Shape.ts b/src/output/Shape.ts
index ea9eb7db7..930c949d0 100644
--- a/src/output/Shape.ts
+++ b/src/output/Shape.ts
@@ -2,7 +2,6 @@ import toStructure from '../basis/toStructure';
 import { TYPE_SYMBOL } from '../parser/Symbols';
 import StructureValue from '../values/StructureValue';
 import { getBind } from '../locale/getBind';
-import type Locale from '../locale/Locale';
 import type Color from './Color';
 import Output, { DefaultStyle } from './Output';
 import type TextLang from './TextLang';
@@ -16,8 +15,9 @@ import type { NameGenerator } from './Stage';
 import { getOutputInput } from './Valued';
 import { getStyle } from './toOutput';
 import Place from './Place';
+import type Locales from '../locale/Locales';
 
-export function createShapeType(locales: Locale[]) {
+export function createShapeType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Shape, TYPE_SYMBOL)} Output(
         ${getBind(locales, (locale) => locale.output.Shape.form)}•Rectangle
@@ -43,6 +43,7 @@ export function createShapeType(locales: Locale[]) {
         ${getBind(locales, (locale) => locale.output.Shape.exiting)}•ø|🤪|💃: ø
         ${getBind(locales, (locale) => locale.output.Shape.duration)}•#s: 0.25s
         ${getBind(locales, (locale) => locale.output.Shape.style)}•${locales
+        .getLocales()
         .map((locale) =>
             Object.values(locale.output.Easing).map((id) => `"${id}"`)
         )
@@ -52,7 +53,7 @@ export function createShapeType(locales: Locale[]) {
 `);
 }
 
-export function createRectangleType(locales: Locale[]) {
+export function createRectangleType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Rectangle, TYPE_SYMBOL)}(
         ${getBind(locales, (locale) => locale.output.Rectangle.left)}•#m
@@ -139,11 +140,11 @@ export default class Shape extends Output {
         return this.background;
     }
 
-    getShortDescription(locales: Locale[]) {
+    getShortDescription(locales: Locales) {
         return this.getDescription(locales);
     }
 
-    getDescription(locales: Locale[]) {
+    getDescription(locales: Locales) {
         return this.form.getDescription(locales);
     }
 
diff --git a/src/output/Stack.ts b/src/output/Stack.ts
index b14d7edfb..9446f5268 100644
--- a/src/output/Stack.ts
+++ b/src/output/Stack.ts
@@ -10,12 +10,12 @@ import NumberValue from '@values/NumberValue';
 import Phrase from './Phrase';
 import Group from './Group';
 import concretize from '../locale/concretize';
-import type Locale from '../locale/Locale';
 import { getOutputInput } from './Valued';
 import StructureValue from '../values/StructureValue';
 import Decimal from 'decimal.js';
+import type Locales from '../locale/Locales';
 
-export function createStackType(locales: Locale[]) {
+export function createStackType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Stack, '•')} Arrangement(
         ${getBind(locales, (locale) => locale.output.Stack.alignment)}•-1|0|1: 0
@@ -118,10 +118,10 @@ export class Stack extends Arrangement {
         return undefined;
     }
 
-    getDescription(output: Output[], locales: Locale[]) {
+    getDescription(output: Output[], locales: Locales) {
         return concretize(
-            locales[0],
-            locales[0].output.Stack.description,
+            locales,
+            locales.get((l) => l.output.Stack.description),
             output.length,
             output.filter((o) => o instanceof Phrase).length,
             output.filter((o) => o instanceof Group).length
diff --git a/src/output/Stage.ts b/src/output/Stage.ts
index d2047c322..715da0e7c 100644
--- a/src/output/Stage.ts
+++ b/src/output/Stage.ts
@@ -15,20 +15,20 @@ import TextLang from './TextLang';
 import Pose, { DefinitePose } from './Pose';
 import type Sequence from './Sequence';
 import concretize from '../locale/concretize';
-import type Locale from '../locale/Locale';
 import { getOutputInput } from './Valued';
 import { SupportedFontsFamiliesType, type SupportedFace } from '../basis/Fonts';
-import { getFirstName } from '../locale/Locale';
 import { toRectangle, type Rectangle } from './Form';
 import Shape from './Shape';
 import type Evaluator from '../runtime/Evaluator';
+import type Locales from '../locale/Locales';
+import { getFirstName } from '../locale/Locale';
 
 export const DefaultGravity = 9.8;
 
 export const CSSFallbackFaces = `"Noto Color Emoji"`;
 export const DefaultSize = 1;
 
-export function createStageType(locales: Locale[]) {
+export function createStageType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Stage, '•')} Output(
     ${getBind(locales, (locale) => locale.output.Stage.content)}•[Output]
@@ -37,7 +37,7 @@ export function createStageType(locales: Locale[]) {
     ${getBind(
         locales,
         (locale) => locale.output.Stage.face
-    )}•${SupportedFontsFamiliesType}: "${locales[0].ui.font.app}"
+    )}•${SupportedFontsFamiliesType}: "${locales.getLocales()[0].ui.font.app}"
     ${getBind(locales, (locale) => locale.output.Stage.place)}•📍|ø: ø
     ${getBind(locales, (locale) => locale.output.Stage.name)}•""|ø: ø
     ${getBind(locales, (locale) => locale.output.Stage.selectable)}•?: ⊥
@@ -61,6 +61,7 @@ export function createStageType(locales: Locale[]) {
     ${getBind(locales, (locale) => locale.output.Stage.exiting)}•ø|🤪|💃: ø
     ${getBind(locales, (locale) => locale.output.Stage.duration)}•#s: 0.25s
     ${getBind(locales, (locale) => locale.output.Stage.style)}•${locales
+        .getLocales()
         .map((locale) =>
             Object.values(locale.output.Easing).map((id) => `"${id}"`)
         )
@@ -199,17 +200,17 @@ export default class Stage extends Output {
         return undefined;
     }
 
-    getShortDescription(locales: Locale[]) {
+    getShortDescription(locales: Locales) {
         return this.name instanceof TextLang
             ? this.name.text
-            : getFirstName(locales[0].output.Group.names);
+            : locales.get((l) => getFirstName(l.output.Group.names));
     }
 
-    getDescription(locales: Locale[]) {
+    getDescription(locales: Locales) {
         if (this._description === undefined) {
             this._description = concretize(
-                locales[0],
-                locales[0].output.Stage.description,
+                locales,
+                locales.get((l) => l.output.Stage.description),
                 this.content.length,
                 this.name instanceof TextLang ? this.name.text : undefined,
                 this.frame?.getDescription(locales),
diff --git a/src/output/Velocity.ts b/src/output/Velocity.ts
index b118f1fe1..83a4f356e 100644
--- a/src/output/Velocity.ts
+++ b/src/output/Velocity.ts
@@ -4,9 +4,9 @@ import { getBind } from '@locale/getBind';
 import Valued, { getOutputInputs } from './Valued';
 import { toNumber } from './Stage';
 import StructureValue from '../values/StructureValue';
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 
-export function createVelocityType(locales: Locale[]) {
+export function createVelocityType(locales: Locales) {
     return toStructure(`
     ${getBind(locales, (locale) => locale.output.Velocity, '•')}(
         ${getBind(locales, (locale) => locale.output.Velocity.x)}•#m/s|ø: ø
diff --git a/src/output/getOrCreatePlace.ts b/src/output/getOrCreatePlace.ts
index 10c6e54c9..2c4139b8f 100644
--- a/src/output/getOrCreatePlace.ts
+++ b/src/output/getOrCreatePlace.ts
@@ -1,4 +1,4 @@
-import type Locale from '../locale/Locale';
+import type Locales from '../locale/Locales';
 import type Project from '../models/Project';
 import type Context from '../nodes/Context';
 import Evaluate from '../nodes/Evaluate';
@@ -18,7 +18,7 @@ export function getPlaceExpression(
 
 export function getOrCreatePlace(
     project: Project,
-    locale: Locale,
+    locales: Locales,
     evaluate: Evaluate,
     context: Context
 ) {
@@ -28,7 +28,7 @@ export function getOrCreatePlace(
         if (
             place.is(project.shares.output.Place, project.getNodeContext(place))
         )
-            return toPlace(evaluateCode(place.toWordplay(), [], locale));
+            return toPlace(evaluateCode(place.toWordplay(), [], locales));
         else return undefined;
     } else
         return toPlace(
diff --git a/src/routes/+error.svelte b/src/routes/+error.svelte
index a1c2b15f8..c88fc2d73 100644
--- a/src/routes/+error.svelte
+++ b/src/routes/+error.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
     import Header from '../components/app/Header.svelte';
-    import { locale } from '../db/Database';
+    import { locales } from '../db/Database';
     import Link from '../components/app/Link.svelte';
     import Speech from '../components/lore/Speech.svelte';
     import Glyphs from '../lore/Glyphs';
@@ -8,10 +8,10 @@
 </script>
 
 <Writing>
-    <Header>{$locale.ui.page.unknown.header}</Header>
+    <Header>{$locales.get((l) => l.ui.page.unknown.header)}</Header>
     <Speech glyph={Glyphs.Function}
         ><p slot="content">
-            {$locale.ui.page.unknown.message}
+            {$locales.get((l) => l.ui.page.unknown.message)}
             <Link to="/">🏠</Link></p
         ></Speech
     >
diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index 58863b638..0a7a67a9c 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -5,13 +5,7 @@
     import { LocalesSymbol, UserSymbol } from '../components/project/Contexts';
     import { writable } from 'svelte/store';
     import Fonts from '../basis/Fonts';
-    import {
-        locales,
-        DB,
-        animationFactor,
-        languages,
-        dark,
-    } from '../db/Database';
+    import { locales, DB, animationFactor, dark } from '../db/Database';
     import { browser } from '$app/environment';
     import { goto } from '$app/navigation';
     import { PUBLIC_CONTEXT } from '$env/static/public';
@@ -30,7 +24,7 @@
 
     // Keep the page's language and direction up to date.
     $: if (typeof document !== 'undefined') {
-        const language = $locales[0].language;
+        const language = $locales.getLocale().language;
         document.documentElement.setAttribute('lang', language);
         document.documentElement.setAttribute(
             'dir',
@@ -80,20 +74,23 @@
     class:dark={$dark}
     style:--animation-factor={$animationFactor}
     style:--wordplay-app-font={Array.from(
-        new Set([...$locales.map((locale) => locale.ui.font.app), 'Noto Emoji'])
+        new Set([
+            ...$locales.getLocales().map((locale) => locale.ui.font.app),
+            'Noto Emoji',
+        ])
     )
         .map((font) => `"${font}"`)
         .join(', ')}
     style:--wordplay-code-font={Array.from(
         new Set([
-            ...$locales.map((locale) => locale.ui.font.code),
+            ...$locales.getLocales().map((locale) => locale.ui.font.code),
             'Noto Mono',
             'Noto Emoji',
         ])
     )
         .map((font) => `"${font}"`)
         .join(', ')}
-    lang={$languages[0]}
+    lang={$locales.getLocale().language}
 >
     <slot />
     {#if !loaded && lag}
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index bd4716ed2..1580c1222 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -3,7 +3,7 @@
     import Header from '@components/app/Header.svelte';
     import BigLink from '../components/app/BigLink.svelte';
     import Background from '../components/app/Background.svelte';
-    import { locale } from '../db/Database';
+    import { locales } from '../db/Database';
     import Writing from '../components/app/Writing.svelte';
     import Speech from '../components/lore/Speech.svelte';
     import Glyphs from '../lore/Glyphs';
@@ -20,12 +20,12 @@
 
 <Background />
 <Writing>
-    <Header>{$locale.wordplay}<sub>.dev</sub></Header>
+    <Header>{$locales.get((l) => l.wordplay)}<sub>.dev</sub></Header>
     <div class="welcome">
         <Speech glyph={Glyphs.Function} emotion={Emotion.happy}
             ><svelte:fragment slot="content"
                 ><MarkupHtmlView
-                    markup={$locale.ui.page.landing.call}
+                    markup={$locales.get((l) => l.ui.page.landing.call)}
                 /></svelte:fragment
             ></Speech
         >
@@ -42,22 +42,30 @@
             >.</p
         >
     {:else}
-        <BigLink to="/learn" subtitle={$locale.ui.page.landing.link.learn}
-            >{$locale.ui.page.learn.header}</BigLink
+        <BigLink
+            to="/learn"
+            subtitle={$locales.get((l) => l.ui.page.landing.link.learn)}
+            >{$locales.get((l) => l.ui.page.learn.header)}</BigLink
         >
-        <BigLink to="/projects" subtitle={$locale.ui.page.landing.link.projects}
-            >{$locale.ui.page.projects.header}</BigLink
+        <BigLink
+            to="/projects"
+            subtitle={$locales.get((l) => l.ui.page.landing.link.projects)}
+            >{$locales.get((l) => l.ui.page.projects.header)}</BigLink
         >
         <BigLink
             to="/galleries"
-            subtitle={$locale.ui.page.landing.link.galleries}
-            >{$locale.ui.page.galleries.header}</BigLink
+            subtitle={$locales.get((l) => l.ui.page.landing.link.galleries)}
+            >{$locales.get((l) => l.ui.page.galleries.header)}</BigLink
         >
-        <BigLink to="/about" subtitle={$locale.ui.page.landing.link.about}
-            >{$locale.ui.page.about.header}</BigLink
+        <BigLink
+            to="/about"
+            subtitle={$locales.get((l) => l.ui.page.landing.link.about)}
+            >{$locales.get((l) => l.ui.page.about.header)}</BigLink
         >
-        <BigLink to="/rights" subtitle={$locale.ui.page.landing.link.rights}
-            >{$locale.ui.page.rights.header}</BigLink
+        <BigLink
+            to="/rights"
+            subtitle={$locales.get((l) => l.ui.page.landing.link.rights)}
+            >{$locales.get((l) => l.ui.page.rights.header)}</BigLink
         >
     {/if}
 </Writing>
diff --git a/src/routes/about/+page.svelte b/src/routes/about/+page.svelte
index e58166e8d..4ef340c88 100644
--- a/src/routes/about/+page.svelte
+++ b/src/routes/about/+page.svelte
@@ -2,11 +2,11 @@
     import Header from '../../components/app/Header.svelte';
     import Writing from '../../components/app/Writing.svelte';
     import MarkupHtmlView from '../../components/concepts/MarkupHTMLView.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
 </script>
 
 <Writing>
-    <Header>{$locale.ui.page.about.header}</Header>
+    <Header>{$locales.get((l) => l.ui.page.about.header)}</Header>
 
-    <MarkupHtmlView markup={$locale.ui.page.about.content} />
+    <MarkupHtmlView markup={$locales.get((l) => l.ui.page.about.content)} />
 </Writing>
diff --git a/src/routes/galleries/+page.svelte b/src/routes/galleries/+page.svelte
index 5c3440ab7..5163d3e5d 100644
--- a/src/routes/galleries/+page.svelte
+++ b/src/routes/galleries/+page.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
     import Header from '@components/app/Header.svelte';
     import Writing from '@components/app/Writing.svelte';
-    import { locale } from '@db/Database';
+    import { locales } from '@db/Database';
     import MarkupHtmlView from '../../components/concepts/MarkupHTMLView.svelte';
     import { onMount } from 'svelte';
     import {
@@ -66,12 +66,12 @@
 </script>
 
 <svelte:head>
-    <title>{$locale.ui.page.galleries.header}</title>
+    <title>{$locales.get((l) => l.ui.page.galleries.header)}</title>
 </svelte:head>
 
 <Writing>
-    <Header>{$locale.ui.page.galleries.header}</Header>
-    <MarkupHtmlView markup={$locale.ui.page.galleries.prompt} />
+    <Header>{$locales.get((l) => l.ui.page.galleries.header)}</Header>
+    <MarkupHtmlView markup={$locales.get((l) => l.ui.page.galleries.prompt)} />
 
     {#if galleries === undefined}
         <Spinning label="" />
diff --git a/src/routes/gallery/[galleryid]/+page.svelte b/src/routes/gallery/[galleryid]/+page.svelte
index 68d192b76..5224592e9 100644
--- a/src/routes/gallery/[galleryid]/+page.svelte
+++ b/src/routes/gallery/[galleryid]/+page.svelte
@@ -3,7 +3,7 @@
     import Feedback from '@components/app/Feedback.svelte';
     import Loading from '@components/app/Loading.svelte';
     import Writing from '@components/app/Writing.svelte';
-    import { Galleries, Projects, locale } from '@db/Database';
+    import { Galleries, Projects, locales } from '@db/Database';
     import Header from '@components/app/Header.svelte';
     import MarkupHtmlView from '@components/concepts/MarkupHTMLView.svelte';
     import { goto } from '$app/navigation';
@@ -20,7 +20,6 @@
     import type Project from '../../../models/Project';
     import ProjectPreviewSet from '@components/app/ProjectPreviewSet.svelte';
     import Button from '../../../components/widgets/Button.svelte';
-    import { locales } from '@db/Database';
     import { EDIT_SYMBOL } from '../../../parser/Symbols';
     import getProjectLink from '../../../components/app/getProjectLink';
 
@@ -53,8 +52,8 @@
 
     onDestroy(() => pageUnsubscribe());
 
-    $: name = gallery?.getName($locale);
-    $: description = gallery?.getDescription($locale);
+    $: name = gallery?.getName($locales.getLocale());
+    $: description = gallery?.getDescription($locales.getLocale());
     $: editable = gallery
         ? $user !== null && gallery.getCurators().includes($user.uid)
         : false;
@@ -74,8 +73,8 @@
         if (gallery === undefined || gallery === null) return;
         // Add the new project
         const newProjectID = Projects.create(
-            $locales,
-            $locale.newProject,
+            $locales.getLocales(),
+            $locales.getLocale().newProject,
             gallery.getID()
         );
         // Add it to this gallery.
@@ -91,38 +90,56 @@
 {:else}
     <Writing>
         {#if gallery === undefined}
-            <Feedback>{$locale.ui.gallery.error.unknown}</Feedback>
+            <Feedback
+                >{$locales.get((l) => l.ui.gallery.error.unknown)}</Feedback
+            >
         {:else}
             <Header
                 >{#if editable}<TextField
                         text={name ?? ''}
-                        description={$locale.ui.gallery.field.name.description}
-                        placeholder={$locale.ui.gallery.field.name.placeholder}
+                        description={$locales.get(
+                            (l) => l.ui.gallery.field.name.description
+                        )}
+                        placeholder={$locales.get(
+                            (l) => l.ui.gallery.field.name.placeholder
+                        )}
                         done={(text) =>
                             gallery
                                 ? Galleries.edit(
-                                      gallery.withName(text, $locale)
+                                      gallery.withName(
+                                          text,
+                                          $locales.getLocale()
+                                      )
                                   )
                                 : undefined}
-                    />{:else if name}{name}{:else}{$locale.ui.gallery.field.name
-                        .placeholder}{/if}</Header
+                    />{:else if name}{name}{:else}{$locales.get(
+                        (l) => l.ui.gallery.field.name.placeholder
+                    )}{/if}</Header
             >
             <div class="collection">
                 {#if !editable}<MarkupHtmlView
                         markup={description
                             ? description.split('\n').join('\n\n')
-                            : $locale.ui.gallery.field.description.placeholder}
+                            : $locales.get(
+                                  (l) =>
+                                      l.ui.gallery.field.description.placeholder
+                              )}
                     />{:else}
                     <TextBox
                         text={description ?? ''}
-                        description={$locale.ui.gallery.field.description
-                            .description}
-                        placeholder={$locale.ui.gallery.field.description
-                            .placeholder}
+                        description={$locales.get(
+                            (l) => l.ui.gallery.field.description.description
+                        )}
+                        placeholder={$locales.get(
+                            (l) => l.ui.gallery.field.description.placeholder
+                        )}
                         done={(text) =>
                             gallery
                                 ? Galleries.edit(
-                                      gallery.withDescription(text, $locale)
+                                      gallery.withDescription(
+                                          text,
+                                          $locales.getLocale()
+                                      )
                                   )
                                 : undefined}
                     />
@@ -132,19 +149,22 @@
                     <ProjectPreviewSet
                         set={projects}
                         edit={{
-                            description:
-                                $locale.ui.page.projects.button.editproject,
+                            description: $locales.get(
+                                (l) => l.ui.page.projects.button.editproject
+                            ),
                             action: (project) =>
                                 goto(getProjectLink(project, false)),
                             label: EDIT_SYMBOL,
                         }}
                         remove={(project) => {
                             return {
-                                prompt: $locale.ui.gallery.confirm.remove
-                                    .prompt,
-                                description:
-                                    $locale.ui.gallery.confirm.remove
-                                        .description,
+                                prompt: $locales.get(
+                                    (l) => l.ui.gallery.confirm.remove.prompt
+                                ),
+                                description: $locales.get(
+                                    (l) =>
+                                        l.ui.gallery.confirm.remove.description
+                                ),
                                 action: () =>
                                     gallery
                                         ? Galleries.removeProject(project)
@@ -157,7 +177,9 @@
 
                 {#if editable}
                     <Button
-                        tip={$locale.ui.page.projects.button.newproject}
+                        tip={$locales.get(
+                            (l) => l.ui.page.projects.button.newproject
+                        )}
                         action={newProject}
                         ><span style:font-size="xxx-large">+</span>
                     </Button>
@@ -166,10 +188,14 @@
 
             {#if editable || gallery.getCurators().length > 0}
                 <Subheader
-                    >{$locale.ui.gallery.subheader.curators.header}</Subheader
+                    >{$locales.get(
+                        (l) => l.ui.gallery.subheader.curators.header
+                    )}</Subheader
                 >
                 <MarkupHtmlView
-                    markup={$locale.ui.gallery.subheader.curators.explanation}
+                    markup={$locales.get(
+                        (l) => l.ui.gallery.subheader.curators.explanation
+                    )}
                 />
                 <CreatorList
                     uids={gallery.getCurators()}
@@ -194,10 +220,14 @@
 
             {#if editable || gallery.getCreators().length > 0}
                 <Subheader
-                    >{$locale.ui.gallery.subheader.creators.header}</Subheader
+                    >{$locales.get(
+                        (l) => l.ui.gallery.subheader.creators.header
+                    )}</Subheader
                 >
                 <MarkupHtmlView
-                    markup={$locale.ui.gallery.subheader.creators.explanation}
+                    markup={$locales.get(
+                        (l) => l.ui.gallery.subheader.creators.explanation
+                    )}
                 />
                 <CreatorList
                     anonymize={!editable}
@@ -225,25 +255,34 @@
                     }}
                 />
                 <Subheader
-                    >{$locale.ui.gallery.subheader.delete.header}</Subheader
+                    >{$locales.get(
+                        (l) => l.ui.gallery.subheader.delete.header
+                    )}</Subheader
                 >
                 <MarkupHtmlView
-                    markup={$locale.ui.gallery.subheader.delete.explanation}
+                    markup={$locales.get(
+                        (l) => l.ui.gallery.subheader.delete.explanation
+                    )}
                 />
 
                 <p>
                     <ConfirmButton
                         background
-                        tip={$locale.ui.gallery.confirm.delete.description}
-                        prompt={$locale.ui.gallery.confirm.delete.prompt}
+                        tip={$locales.get(
+                            (l) => l.ui.gallery.confirm.delete.description
+                        )}
+                        prompt={$locales.get(
+                            (l) => l.ui.gallery.confirm.delete.prompt
+                        )}
                         action={async () => {
                             if (gallery) {
                                 await Galleries.delete(gallery);
                                 goto('/projects');
                             }
                         }}
-                        >{$locale.ui.gallery.confirm.delete
-                            .prompt}</ConfirmButton
+                        >{$locales.get(
+                            (l) => l.ui.gallery.confirm.delete.prompt
+                        )}</ConfirmButton
                     >
                 </p>
             {/if}
diff --git a/src/routes/learn/+page.svelte b/src/routes/learn/+page.svelte
index 346ae51c0..2058da502 100644
--- a/src/routes/learn/+page.svelte
+++ b/src/routes/learn/+page.svelte
@@ -6,7 +6,7 @@
     import {
         Locales,
         Settings,
-        locale,
+        locales,
         tutorialProgress,
     } from '../../db/Database';
     import { onMount } from 'svelte';
@@ -22,15 +22,18 @@
     let tutorial: Tutorial | undefined | null = undefined;
 
     onMount(async () => {
-        tutorial = await Locales.getTutorial($locale.language, $locale.region);
+        tutorial = await Locales.getTutorial(
+            $locales.get((l) => l.language),
+            $locales.get((l) => l.region)
+        );
     });
 
     // If hot module reloading, and there's a locale update, refresh the tutorial.
     if (import.meta.hot) {
         import.meta.hot.on('locales-update', async () => {
             tutorial = await Locales.getTutorial(
-                $locale.language,
-                $locale.region
+                $locales.get((l) => l.language),
+                $locales.get((l) => l.region)
             );
         });
     }
@@ -59,7 +62,7 @@
         <Header>:(</Header>
         <Speech glyph={Glyphs.Function}
             ><p slot="content">
-                {$locale.ui.page.learn.error}
+                {$locales.get((l) => l.ui.page.learn.error)}
                 <Link to="/">🏠</Link></p
             ></Speech
         ></Writing
diff --git a/src/routes/login/+page.svelte b/src/routes/login/+page.svelte
index cf3ed63b5..2e1882226 100644
--- a/src/routes/login/+page.svelte
+++ b/src/routes/login/+page.svelte
@@ -13,7 +13,7 @@
     import { FirebaseError } from 'firebase/app';
     import { analytics, auth, firestore } from '@db/firebase';
     import { onMount } from 'svelte';
-    import { DB, locale } from '../../db/Database';
+    import { DB, locales } from '../../db/Database';
     import Feedback from '../../components/app/Feedback.svelte';
     import Writing from '../../components/app/Writing.svelte';
     import validateEmail from '../../db/validEmail';
@@ -38,10 +38,16 @@
 
     let Errors: Record<string, string>;
     $: Errors = {
-        'auth/id-token-expired': $locale.ui.page.login.error.expired,
-        'auth/id-token-revoked': $locale.ui.page.login.error.invalid,
-        'auth/invalid-argument': $locale.ui.page.login.error.invalid,
-        'auth/invalid-email': $locale.ui.page.login.error.email,
+        'auth/id-token-expired': $locales.get(
+            (l) => l.ui.page.login.error.expired
+        ),
+        'auth/id-token-revoked': $locales.get(
+            (l) => l.ui.page.login.error.invalid
+        ),
+        'auth/invalid-argument': $locales.get(
+            (l) => l.ui.page.login.error.invalid
+        ),
+        'auth/invalid-email': $locales.get((l) => l.ui.page.login.error.email),
     };
 
     let moderator = false;
@@ -53,10 +59,11 @@
             console.error(err.code);
             console.error(err.message);
             loginFeedback =
-                Errors[err.code] ?? $locale.ui.page.login.error.failure;
+                Errors[err.code] ??
+                $locales.get((l) => l.ui.page.login.error.failure);
         } else {
             console.error(err);
-            loginFeedback = $locale.ui.page.login.error.failure;
+            loginFeedback = $locales.get((l) => l.ui.page.login.error.failure);
         }
         success = false;
     }
@@ -124,7 +131,9 @@
         changeSubmitted = true;
         try {
             await updateEmail(user, email);
-            changeFeedback = $locale.ui.page.login.prompt.confirm;
+            changeFeedback = $locales.get(
+                (l) => l.ui.page.login.prompt.confirm
+            );
         } catch (error) {
             if (
                 error !== null &&
@@ -137,7 +146,8 @@
                 console.error(error.code);
                 console.error(error.message);
                 changeFeedback =
-                    Errors[error.code] ?? $locale.ui.page.login.error.unchanged;
+                    Errors[error.code] ??
+                    $locales.get((l) => l.ui.page.login.error.unchanged);
             }
         } finally {
             changeSubmitted = false;
@@ -185,49 +195,61 @@
 
             <div class="actions">
                 <div class="action">
-                    <p>{$locale.ui.page.login.prompt.play}</p>
+                    <p>{$locales.get((l) => l.ui.page.login.prompt.play)}</p>
                     <p
                         ><Link to="/projects"
-                            >{$locale.ui.page.projects.header}</Link
+                            >{$locales.get(
+                                (l) => l.ui.page.projects.header
+                            )}</Link
                         ></p
                     >
                 </div>
                 <div class="action">
-                    <p>{$locale.ui.page.login.prompt.name}</p>
+                    <p>{$locales.get((l) => l.ui.page.login.prompt.name)}</p>
                     <EmojiChooser
                         pick={(name) => rename(name)}
                         emoji={$user?.displayName ?? ''}
                     />
                 </div>
                 <div class="action">
-                    <p>{$locale.ui.page.login.prompt.logout}</p>
+                    <p>{$locales.get((l) => l.ui.page.login.prompt.logout)}</p>
                     <p
                         ><Button
                             background
-                            tip={$locale.ui.page.login.button.logout.tip}
+                            tip={$locales.get(
+                                (l) => l.ui.page.login.button.logout.tip
+                            )}
                             action={logout}
-                            >{$locale.ui.page.login.button.logout.label}</Button
+                            >{$locales.get(
+                                (l) => l.ui.page.login.button.logout.label
+                            )}</Button
                         ></p
                     >
                 </div>
                 <div class="action">
-                    <p>{$locale.ui.page.login.prompt.change}</p>
+                    <p>{$locales.get((l) => l.ui.page.login.prompt.change)}</p>
                     <form on:submit={update}>
                         <TextField
-                            description={$locale.ui.page.login.field.email
-                                .description}
-                            placeholder={$locale.ui.page.login.field.email
-                                .placeholder}
+                            description={$locales.get(
+                                (l) => l.ui.page.login.field.email.description
+                            )}
+                            placeholder={$locales.get(
+                                (l) => l.ui.page.login.field.email.placeholder
+                            )}
                             bind:text={email}
                             editable={!changeSubmitted}
                         /><Button
                             submit
-                            tip={$locale.ui.page.login.button.update}
+                            tip={$locales.get(
+                                (l) => l.ui.page.login.button.update
+                            )}
                             active={validateEmail(email)}
                             action={() => undefined}>&gt;</Button
                         >
                         {#if changeSubmitted}<Spinning
-                                label={$locale.ui.page.login.feedback.changing}
+                                label={$locales.get(
+                                    (l) => l.ui.page.login.feedback.changing
+                                )}
                             />
                         {:else if changeFeedback}<Feedback inline
                                 >{changeFeedback}</Feedback
@@ -236,21 +258,30 @@
                 </div>
                 <div class="action"
                     >{#if !deleteSubmitted}
-                        <p>{$locale.ui.page.login.prompt.delete}</p>
+                        <p
+                            >{$locales.get(
+                                (l) => l.ui.page.login.prompt.delete
+                            )}</p
+                        >
                         <p
                             ><Button
                                 background
-                                tip={$locale.ui.page.login.button.delete.tip}
+                                tip={$locales.get(
+                                    (l) => l.ui.page.login.button.delete.tip
+                                )}
                                 action={() =>
                                     (deleteRequested = !deleteRequested)}
                                 active={!deleteRequested}
-                                >{$locale.ui.page.login.button.delete
-                                    .label}</Button
+                                >{$locales.get(
+                                    (l) => l.ui.page.login.button.delete.label
+                                )}</Button
                             >
                         </p>
                         {#if deleteRequested}
                             <p aria-live="assertive">
-                                {$locale.ui.page.login.prompt.reallyDelete}
+                                {$locales.get(
+                                    (l) => l.ui.page.login.prompt.reallyDelete
+                                )}
                             </p>
 
                             <form
@@ -260,36 +291,55 @@
                                         : undefined}
                             >
                                 <TextField
-                                    description={$locale.ui.page.login.field
-                                        .email.description}
-                                    placeholder={$locale.ui.page.login.field
-                                        .email.placeholder}
+                                    description={$locales.get(
+                                        (l) =>
+                                            l.ui.page.login.field.email
+                                                .description
+                                    )}
+                                    placeholder={$locales.get(
+                                        (l) =>
+                                            l.ui.page.login.field.email
+                                                .placeholder
+                                    )}
                                     fill={true}
                                     bind:text={confirmEmail}
                                 />
                                 <Button
                                     background
                                     submit
-                                    tip={$locale.ui.page.login.button
-                                        .reallyDelete.tip}
+                                    tip={$locales.get(
+                                        (l) =>
+                                            l.ui.page.login.button.reallyDelete
+                                                .tip
+                                    )}
                                     active={readyToDeleteAccount(confirmEmail)}
                                     action={deleteAccount}
-                                    >{$locale.ui.page.login.button.reallyDelete
-                                        .label}</Button
+                                    >{$locales.get(
+                                        (l) =>
+                                            l.ui.page.login.button.reallyDelete
+                                                .label
+                                    )}</Button
                                 >
                             </form>
                         {/if}
                     {:else}
                         {#if successfullyDeleted === undefined}
-                            <p>{$locale.ui.page.login.feedback.deleting}</p>
+                            <p
+                                >{$locales.get(
+                                    (l) => l.ui.page.login.feedback.deleting
+                                )}</p
+                            >
                             <p
                                 ><Spinning
-                                    label={$locale.ui.page.login.feedback
-                                        .deleting}
+                                    label={$locales.get(
+                                        (l) => l.ui.page.login.feedback.deleting
+                                    )}
                                 /></p
                             >{:else if successfullyDeleted === false}
                             <p aria-live="assertive"
-                                >{$locale.ui.page.login.error.delete}</p
+                                >{$locales.get(
+                                    (l) => l.ui.page.login.error.delete
+                                )}</p
                             >
                         {/if}
                     {/if}
@@ -303,38 +353,51 @@
                 {/if}
             </div>
         {:else}
-            <Header>{$locale.ui.page.login.header}</Header>
+            <Header>{$locales.get((l) => l.ui.page.login.header)}</Header>
             <p>
                 {#if missingEmail}
-                    {$locale.ui.page.login.prompt.enter}
+                    {$locales.get((l) => l.ui.page.login.prompt.enter)}
                 {:else if $user === null}
-                    {$locale.ui.page.login.prompt.login}
+                    {$locales.get((l) => l.ui.page.login.prompt.login)}
                 {/if}
             </p>
             <form on:submit={startLogin}>
                 <TextField
-                    description={$locale.ui.page.login.field.email.description}
-                    placeholder={$locale.ui.page.login.field.email.placeholder}
+                    description={$locales.get(
+                        (l) => l.ui.page.login.field.email.description
+                    )}
+                    placeholder={$locales.get(
+                        (l) => l.ui.page.login.field.email.placeholder
+                    )}
                     bind:text={email}
                 /><Button
                     submit
-                    tip={$locale.ui.page.login.button.login}
+                    tip={$locales.get((l) => l.ui.page.login.button.login)}
                     active={validateEmail(email)}
                     action={() => undefined}>&gt;</Button
                 >
             </form>
             <p>
                 {#if sent === true}
-                    <Feedback>{$locale.ui.page.login.prompt.sent}</Feedback>
+                    <Feedback
+                        >{$locales.get(
+                            (l) => l.ui.page.login.prompt.sent
+                        )}</Feedback
+                    >
                 {:else if success === true}
-                    <Feedback>{$locale.ui.page.login.prompt.success}</Feedback>
+                    <Feedback
+                        >{$locales.get(
+                            (l) => l.ui.page.login.prompt.success
+                        )}</Feedback
+                    >
                 {:else if success === false}
                     <Feedback>{loginFeedback}</Feedback>
                 {/if}
             </p>
         {/if}
     {:else}
-        <Feedback>{$locale.ui.page.login.error.offline}</Feedback>
+        <Feedback>{$locales.get((l) => l.ui.page.login.error.offline)}</Feedback
+        >
     {/if}
 </Writing>
 
diff --git a/src/routes/moderate/+page.svelte b/src/routes/moderate/+page.svelte
index ff4396b26..cd894b1be 100644
--- a/src/routes/moderate/+page.svelte
+++ b/src/routes/moderate/+page.svelte
@@ -31,7 +31,7 @@
     import type Project from '../../models/Project';
     import { Projects } from '../../db/Database';
     import { writable } from 'svelte/store';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
     import MarkupHtmlView from '@components/concepts/MarkupHTMLView.svelte';
     import Checkbox from '@components/widgets/Checkbox.svelte';
     import Button from '../../components/widgets/Button.svelte';
@@ -115,7 +115,7 @@
 <Page>
     <div class="moderate">
         <div class="flags">
-            <Header>{$locale.moderation.moderate.header}</Header>
+            <Header>{$locales.get((l) => l.moderation.moderate.header)}</Header>
             {#if lastBatch === null}
                 <Spinning label="" />
             {:else if moderator === false}
@@ -129,7 +129,9 @@
                 <Spinning label="" />
             {:else}
                 <MarkupHtmlView
-                    markup={$locale.moderation.moderate.explanation}
+                    markup={$locales.get(
+                        (l) => l.moderation.moderate.explanation
+                    )}
                 />
                 {#each Object.entries(project.getFlags()) as [flag, state]}
                     <div class="flag">
@@ -145,7 +147,8 @@
                         />
                         <label for={flag}>
                             <MarkupHtmlView
-                                markup={getFlagDescription(flag, $locale) ?? ''}
+                                markup={getFlagDescription(flag, $locales) ??
+                                    ''}
                             /></label
                         >
                     </div>
@@ -153,15 +156,21 @@
                 <div class="controls">
                     <Button
                         background
-                        tip={$locale.moderation.button.submit.tip}
+                        tip={$locales.get(
+                            (l) => l.moderation.button.submit.tip
+                        )}
                         action={save}
-                        >{$locale.moderation.button.submit.label}</Button
+                        >{$locales.get(
+                            (l) => l.moderation.button.submit.label
+                        )}</Button
                     >
                     <Button
                         background
-                        tip={$locale.moderation.button.skip.tip}
+                        tip={$locales.get((l) => l.moderation.button.skip.tip)}
                         action={skip}
-                        >{$locale.moderation.button.skip.label}</Button
+                        >{$locales.get(
+                            (l) => l.moderation.button.skip.label
+                        )}</Button
                     >
                 </div>
             {/if}
diff --git a/src/routes/project/[projectid]/+page.svelte b/src/routes/project/[projectid]/+page.svelte
index 644fa6706..7d6c16423 100644
--- a/src/routes/project/[projectid]/+page.svelte
+++ b/src/routes/project/[projectid]/+page.svelte
@@ -12,7 +12,7 @@
     import Loading from '@components/app/Loading.svelte';
     import { setContext } from 'svelte';
     import { browser } from '$app/environment';
-    import { Projects, locale } from '@db/Database';
+    import { Projects, locales } from '@db/Database';
     import Page from '@components/app/Page.svelte';
     import { Settings } from '@db/Database';
     import Writing from '../../../components/app/Writing.svelte';
@@ -94,5 +94,8 @@
 {:else if loading}
     <Loading />
 {:else if $page.params.projectid || error}
-    <Writing><Feedback>{$locale.ui.project.error.unknown}</Feedback></Writing>
+    <Writing
+        ><Feedback>{$locales.get((l) => l.ui.project.error.unknown)}</Feedback
+        ></Writing
+    >
 {/if}
diff --git a/src/routes/projects/+page.svelte b/src/routes/projects/+page.svelte
index 97fcd9049..d5f91dc07 100644
--- a/src/routes/projects/+page.svelte
+++ b/src/routes/projects/+page.svelte
@@ -6,7 +6,6 @@
         Projects,
         archivedProjects,
         editableProjects,
-        locale,
         locales,
     } from '@db/Database';
     import ProjectPreviewSet from '@components/app/ProjectPreviewSet.svelte';
@@ -25,7 +24,10 @@
     const user = getUser();
 
     function newProject() {
-        const newProjectID = Projects.create($locales, $locale.newProject);
+        const newProjectID = Projects.create(
+            $locales.getLocales(),
+            $locales.get((l) => l.newProject)
+        );
         goto(`/project/${newProjectID}`);
     }
 
@@ -33,7 +35,7 @@
     async function newGallery() {
         newGalleryError = false;
         try {
-            const newGalleryID = await Galleries.create($locale);
+            const newGalleryID = await Galleries.create($locales);
             goto(`/gallery/${newGalleryID}`);
         } catch (error) {
             console.error(error);
@@ -49,15 +51,17 @@
 </script>
 
 <svelte:head>
-    <title>{$locale.ui.page.projects.header}</title>
+    <title>{$locales.get((l) => l.ui.page.projects.header)}</title>
 </svelte:head>
 
 <Writing>
-    <Header>{$locale.ui.page.projects.header}</Header>
-    <MarkupHtmlView markup={$locale.ui.page.projects.projectprompt} />
+    <Header>{$locales.get((l) => l.ui.page.projects.header)}</Header>
+    <MarkupHtmlView
+        markup={$locales.get((l) => l.ui.page.projects.projectprompt)}
+    />
     <p class="add">
         <Button
-            tip={$locale.ui.page.projects.button.newproject}
+            tip={$locales.get((l) => l.ui.page.projects.button.newproject)}
             action={newProject}
             ><span style:font-size="xxx-large">+</span>
         </Button></p
@@ -65,15 +69,20 @@
     <ProjectPreviewSet
         set={$editableProjects}
         edit={{
-            description: $locale.ui.page.projects.button.editproject,
+            description: $locales.get(
+                (l) => l.ui.page.projects.button.editproject
+            ),
             action: (project) => goto(getProjectLink(project, false)),
             label: EDIT_SYMBOL,
         }}
         remove={(project) => {
             return {
-                prompt: $locale.ui.page.projects.confirm.archive.prompt,
-                description:
-                    $locale.ui.page.projects.confirm.archive.description,
+                prompt: $locales.get(
+                    (l) => l.ui.page.projects.confirm.archive.prompt
+                ),
+                description: $locales.get(
+                    (l) => l.ui.page.projects.confirm.archive.description
+                ),
                 action: () => Projects.archiveProject(project.getID(), true),
                 label: '🗑️',
             };
@@ -81,18 +90,30 @@
     />
     <!-- If there are any archived projects, make an archived section. -->
     {#if $archivedProjects.length > 0}
-        <Subheader>{$locale.ui.page.projects.archiveheader}</Subheader>
-        <MarkupHtmlView markup={$locale.ui.page.projects.archiveprompt} />
+        <Subheader
+            >{$locales.get((l) => l.ui.page.projects.archiveheader)}</Subheader
+        >
+        <MarkupHtmlView
+            markup={$locales.get((l) => l.ui.page.projects.archiveprompt)}
+        />
         {#if $user === null}<Feedback
-                >{$locale.ui.page.projects.error.nodeletes}</Feedback
+                >{$locales.get(
+                    (l) => l.ui.page.projects.error.nodeletes
+                )}</Feedback
             >{/if}
         {#if deleteError}
-            <Feedback>{$locale.ui.page.projects.error.delete}</Feedback>
+            <Feedback
+                >{$locales.get(
+                    (l) => l.ui.page.projects.error.delete
+                )}</Feedback
+            >
         {/if}
         <ProjectPreviewSet
             set={$archivedProjects}
             edit={{
-                description: $locale.ui.page.projects.button.unarchive,
+                description: $locales.get(
+                    (l) => l.ui.page.projects.button.unarchive
+                ),
                 action: (project) =>
                     Projects.archiveProject(project.getID(), false),
                 label: '↑🗑️',
@@ -100,11 +121,12 @@
             remove={(project) =>
                 $user && project.getOwner() === $user.uid
                     ? {
-                          prompt: $locale.ui.page.projects.confirm.delete
-                              .prompt,
-                          description:
-                              $locale.ui.page.projects.confirm.delete
-                                  .description,
+                          prompt: $locales.get(
+                              (l) => l.ui.page.projects.confirm.delete
+                          ).prompt,
+                          description: $locales.get(
+                              (l) => l.ui.page.projects.confirm.delete
+                          ).description,
                           action: () => {
                               deleteError = false;
                               try {
@@ -120,32 +142,53 @@
         />
     {/if}
 
-    <Header>{$locale.ui.page.projects.galleriesheader}</Header>
-    <MarkupHtmlView markup={$locale.ui.page.projects.galleryprompt} />
+    <Header>{$locales.get((l) => l.ui.page.projects.galleriesheader)}</Header>
+    <MarkupHtmlView
+        markup={$locales.get((l) => l.ui.page.projects.galleryprompt)}
+    />
     {#if $user}
         <p class="add">
             <Button
-                tip={$locale.ui.page.projects.button.newgallery}
+                tip={$locales.get((l) => l.ui.page.projects.button.newgallery)}
                 action={newGallery}
                 ><span style:font-size="xxx-large">+</span>
             </Button></p
         >
         {#if newGalleryError}
-            <Feedback>{$locale.ui.page.projects.error.newgallery}</Feedback>
+            <Feedback
+                >{$locales.get(
+                    (l) => l.ui.page.projects.error.newgallery
+                )}</Feedback
+            >
         {/if}
         {#if $status === 'loading'}
-            <Spinning label={$locale.ui.widget.loading.message} large />
+            <Spinning
+                label={$locales.get((l) => l.ui.widget.loading.message)}
+                large
+            />
         {:else if $status === 'noaccess'}
-            <Feedback>{$locale.ui.page.projects.error.noaccess}</Feedback>
+            <Feedback
+                >{$locales.get(
+                    (l) => l.ui.page.projects.error.noaccess
+                )}</Feedback
+            >
         {:else if $status === 'loggedout'}
-            <Feedback>{$locale.ui.page.projects.error.nogalleryedits}</Feedback>
+            <Feedback
+                >{$locales.get(
+                    (l) => l.ui.page.projects.error.nogalleryedits
+                )}</Feedback
+            >
         {:else}
             {#each $galleries.values() as gallery}
                 <GalleryPreview gallery={get(gallery)} />
             {/each}
         {/if}
     {:else}
-        <Feedback>{$locale.ui.page.projects.error.nogalleryedits}</Feedback>
+        <Feedback
+            >{$locales.get(
+                (l) => l.ui.page.projects.error.nogalleryedits
+            )}</Feedback
+        >
     {/if}
 </Writing>
 
diff --git a/src/routes/rights/+page.svelte b/src/routes/rights/+page.svelte
index 31d384e03..f48735dc8 100644
--- a/src/routes/rights/+page.svelte
+++ b/src/routes/rights/+page.svelte
@@ -2,17 +2,19 @@
     import Header from '../../components/app/Header.svelte';
     import Writing from '../../components/app/Writing.svelte';
     import MarkupHtmlView from '../../components/concepts/MarkupHTMLView.svelte';
-    import { locale } from '../../db/Database';
+    import { locales } from '../../db/Database';
 </script>
 
 <Writing>
-    <Header>{$locale.ui.page.rights.header}</Header>
+    <Header>{$locales.get((l) => l.ui.page.rights.header)}</Header>
 
-    <MarkupHtmlView markup={$locale.ui.page.rights.content} />
+    <MarkupHtmlView markup={$locales.get((l) => l.ui.page.rights.content)} />
     <MarkupHtmlView
-        markup={Object.values($locale.moderation.flags)
+        markup={Object.values($locales.get((l) => l.moderation.flags))
             .map((promise) => `• ${promise}`)
             .join('\n\n')}
     />
-    <MarkupHtmlView markup={$locale.ui.page.rights.consequences} />
+    <MarkupHtmlView
+        markup={$locales.get((l) => l.ui.page.rights.consequences)}
+    />
 </Writing>
diff --git a/src/runtime/Check.ts b/src/runtime/Check.ts
index 7d0535ffd..f597c94a4 100644
--- a/src/runtime/Check.ts
+++ b/src/runtime/Check.ts
@@ -2,8 +2,8 @@ import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Check extends Step {
     action?: (evaluator: Evaluator) => Value | undefined;
@@ -20,7 +20,10 @@ export default class Check extends Step {
         return this.action?.call(undefined, evaluator);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Iteration.check);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Iteration.check)
+        );
     }
 }
diff --git a/src/runtime/Evaluator.test.ts b/src/runtime/Evaluator.test.ts
index cd0235561..2c79b92c8 100644
--- a/src/runtime/Evaluator.test.ts
+++ b/src/runtime/Evaluator.test.ts
@@ -5,7 +5,7 @@ import EvaluationLimitException from '../values/EvaluationLimitException';
 import StepLimitException from '../values/StepLimitException';
 import Evaluator from '@runtime/Evaluator';
 import { DB } from '../db/Database';
-import DefaultLocale from '../locale/DefaultLocale';
+import DefaultLocale, { DefaultLocales } from '../locale/DefaultLocale';
 
 test.each([0, 1, 10, 15])('Step back %i', (steps: number) => {
     const fib = `
@@ -15,7 +15,7 @@ test.each([0, 1, 10, 15])('Step back %i', (steps: number) => {
 
     const source = new Source('test', fib);
     const project = Project.make(null, 'test', source, [], DefaultLocale);
-    const evaluator = new Evaluator(project, DB, [DefaultLocale]);
+    const evaluator = new Evaluator(project, DB, DefaultLocales);
     evaluator.start();
     const stepIndex = evaluator.getStepIndex();
 
@@ -38,7 +38,7 @@ test('Too many steps', () => {
 
     const source = new Source('test', fib);
     const project = Project.make(null, 'test', source, [], DefaultLocale);
-    const evaluator = new Evaluator(project, DB, [DefaultLocale]);
+    const evaluator = new Evaluator(project, DB, DefaultLocales);
     evaluator.start();
     expect(evaluator.getLatestSourceValue(source)).toBeInstanceOf(
         StepLimitException
@@ -53,7 +53,7 @@ test('Too many evaluations', () => {
 
     const source = new Source('test', fib);
     const project = Project.make(null, 'test', source, [], DefaultLocale);
-    const evaluator = new Evaluator(project, DB, [DefaultLocale]);
+    const evaluator = new Evaluator(project, DB, DefaultLocales);
     evaluator.start();
     expect(evaluator.getLatestSourceValue(source)).toBeInstanceOf(
         EvaluationLimitException
diff --git a/src/runtime/Evaluator.ts b/src/runtime/Evaluator.ts
index 1382570cd..3dfcabf74 100644
--- a/src/runtime/Evaluator.ts
+++ b/src/runtime/Evaluator.ts
@@ -37,6 +37,8 @@ import NumberGenerator from 'recoverable-random';
 import type { Database } from '../db/Database';
 import ReactionStream from '../values/ReactionStream';
 import type Scene from '../output/Scene';
+import Locales from '../locale/Locales';
+import DefaultLocale from '../locale/DefaultLocale';
 
 /** Anything that wants to listen to changes in the state of this evaluator */
 export type EvaluationObserver = () => void;
@@ -66,7 +68,7 @@ export default class Evaluator {
     readonly project: Project;
 
     /** The preferred locales for evaluation. */
-    readonly locales: Locale[];
+    readonly locales: Locales;
 
     /** The database that contains settings for evaluation */
     readonly database: Database;
@@ -233,7 +235,7 @@ export default class Evaluator {
     constructor(
         project: Project,
         database: Database,
-        locales: Locale[],
+        locales: Locales,
         reactive = true,
         prior: Evaluator | undefined = undefined
     ) {
@@ -287,7 +289,11 @@ export default class Evaluator {
             ),
             locale
         );
-        return new Evaluator(project, database, [locale]).getInitialValue();
+        return new Evaluator(
+            project,
+            database,
+            new Locales([locale], DefaultLocale)
+        ).getInitialValue();
     }
 
     /** Mirror the given evaluator's stream history and state, but with the new source. */
@@ -404,7 +410,7 @@ export default class Evaluator {
 
     /** Get the currently selected locales from the database */
     getLocales() {
-        return this.locales;
+        return this.locales.getLocales();
     }
 
     getCurrentEvaluation() {
diff --git a/src/runtime/Finish.ts b/src/runtime/Finish.ts
index e69b08ea6..823b8a3f1 100644
--- a/src/runtime/Finish.ts
+++ b/src/runtime/Finish.ts
@@ -2,7 +2,7 @@ import type Evaluator from '@runtime/Evaluator';
 import Step from './Step';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class Finish extends Step {
     constructor(node: Expression) {
@@ -13,9 +13,9 @@ export default class Finish extends Step {
         return finish(evaluator, this.node);
     }
 
-    getExplanations(translation: Locale, evaluator: Evaluator) {
+    getExplanations(locales: Locales, evaluator: Evaluator) {
         return this.node.getFinishExplanations(
-            translation,
+            locales,
             evaluator.project.getNodeContext(this.node),
             evaluator
         );
diff --git a/src/runtime/Halt.ts b/src/runtime/Halt.ts
index d306ba497..4fd9c6058 100644
--- a/src/runtime/Halt.ts
+++ b/src/runtime/Halt.ts
@@ -3,8 +3,8 @@ import type ExceptionValue from '@values/ExceptionValue';
 import Step from './Step';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Halt extends Step {
     readonly exception: (evaluator: Evaluator) => ExceptionValue;
@@ -22,7 +22,10 @@ export default class Halt extends Step {
         return this.exception(evaluator);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Program.halt);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Program.halt)
+        );
     }
 }
diff --git a/src/runtime/Initialize.ts b/src/runtime/Initialize.ts
index fd0bfbc64..8ec1bdea4 100644
--- a/src/runtime/Initialize.ts
+++ b/src/runtime/Initialize.ts
@@ -2,8 +2,8 @@ import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Initialize extends Step {
     action?: (evaluator: Evaluator) => Value | undefined;
@@ -20,7 +20,10 @@ export default class Initialize extends Step {
         return this.action?.call(undefined, evaluator);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Iteration.initialize);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Iteration.initialize)
+        );
     }
 }
diff --git a/src/runtime/Jump.ts b/src/runtime/Jump.ts
index c7c784c41..af775fa3d 100644
--- a/src/runtime/Jump.ts
+++ b/src/runtime/Jump.ts
@@ -1,9 +1,9 @@
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import type Evaluator from '@runtime/Evaluator';
 import Step from './Step';
 import type Value from '../values/Value';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Jump extends Step {
     readonly count: number;
@@ -23,7 +23,10 @@ export default class Jump extends Step {
         return super.toString() + ' ' + this.count;
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Conditional.afterthen);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Conditional.afterthen)
+        );
     }
 }
diff --git a/src/runtime/JumpIf.ts b/src/runtime/JumpIf.ts
index 711bb7b04..772a42194 100644
--- a/src/runtime/JumpIf.ts
+++ b/src/runtime/JumpIf.ts
@@ -1,11 +1,11 @@
 import BooleanType from '@nodes/BooleanType';
-import type Locale from '@locale/Locale';
 import BoolValue from '@values/BoolValue';
 import type Evaluator from '@runtime/Evaluator';
 import Step from './Step';
 import type Value from '../values/Value';
 import concretize from '../locale/concretize';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class JumpIf extends Step {
     readonly peek: boolean;
@@ -34,11 +34,11 @@ export default class JumpIf extends Step {
         return undefined;
     }
 
-    getExplanations(locale: Locale, evaluator: Evaluator) {
+    getExplanations(locales: Locales, evaluator: Evaluator) {
         const val = evaluator.peekValue();
         return concretize(
-            locale,
-            locale.node.Conditional.else,
+            locales,
+            locales.get((l) => l.node.Conditional.else),
             val instanceof BoolValue && val.bool === this.yes
         );
     }
diff --git a/src/runtime/Next.ts b/src/runtime/Next.ts
index 7c7b6c986..4e6031ada 100644
--- a/src/runtime/Next.ts
+++ b/src/runtime/Next.ts
@@ -2,8 +2,8 @@ import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class Next extends Step {
     action?: (evaluator: Evaluator) => Value | undefined;
@@ -20,7 +20,10 @@ export default class Next extends Step {
         return this.action?.call(undefined, evaluator);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Iteration.next);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Iteration.next)
+        );
     }
 }
diff --git a/src/runtime/Start.ts b/src/runtime/Start.ts
index 7e1c537fd..6d2ee4829 100644
--- a/src/runtime/Start.ts
+++ b/src/runtime/Start.ts
@@ -2,7 +2,7 @@ import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
+import type Locales from '../locale/Locales';
 
 type Action = (evalutor: Evaluator) => Value | undefined;
 
@@ -19,9 +19,9 @@ export default class Start extends Step {
         return this.action === undefined ? value : this.action(evaluator);
     }
 
-    getExplanations(translation: Locale, evaluator: Evaluator) {
+    getExplanations(locales: Locales, evaluator: Evaluator) {
         return this.node.getStartExplanations(
-            translation,
+            locales,
             evaluator.project.getNodeContext(this.node),
             evaluator
         );
diff --git a/src/runtime/StartConversion.ts b/src/runtime/StartConversion.ts
index 127d215c7..77aa7624e 100644
--- a/src/runtime/StartConversion.ts
+++ b/src/runtime/StartConversion.ts
@@ -1,10 +1,10 @@
 import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
-import type Locale from '@locale/Locale';
 import type ConversionDefinition from '@nodes/ConversionDefinition';
 import type Convert from '@nodes/Convert';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class StartConversion extends Step {
     readonly convert: Convert;
@@ -20,7 +20,10 @@ export default class StartConversion extends Step {
         return this.convert.startEvaluation(evaluator, this.conversion);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Evaluate.evaluate);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Evaluate.evaluate)
+        );
     }
 }
diff --git a/src/runtime/StartEvaluation.ts b/src/runtime/StartEvaluation.ts
index 30bfcef79..e28056ab9 100644
--- a/src/runtime/StartEvaluation.ts
+++ b/src/runtime/StartEvaluation.ts
@@ -1,11 +1,11 @@
 import Step from './Step';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
 import type Evaluate from '../nodes/Evaluate';
 import type UnaryEvaluate from '../nodes/UnaryEvaluate';
 import type BinaryEvaluate from '../nodes/BinaryEvaluate';
+import type Locales from '../locale/Locales';
 
 type Eval = BinaryEvaluate | UnaryEvaluate | Evaluate;
 
@@ -21,7 +21,10 @@ export default class StartEvaluation extends Step {
         return this.evaluable.startEvaluation(evaluator);
     }
 
-    getExplanations(locale: Locale) {
-        return concretize(locale, locale.node.Evaluate.evaluate);
+    getExplanations(locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Evaluate.evaluate)
+        );
     }
 }
diff --git a/src/runtime/StartFinish.ts b/src/runtime/StartFinish.ts
index 5e2ef063f..c8c9cfa1e 100644
--- a/src/runtime/StartFinish.ts
+++ b/src/runtime/StartFinish.ts
@@ -4,7 +4,7 @@ import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
 import { finish } from './Finish';
 import { start } from './Start';
-import type Locale from '@locale/Locale';
+import type Locales from '../locale/Locales';
 
 export default class StartFinish extends Step {
     constructor(node: Expression) {
@@ -16,9 +16,9 @@ export default class StartFinish extends Step {
         return finish(evaluator, this.node);
     }
 
-    getExplanations(translation: Locale, evaluator: Evaluator) {
+    getExplanations(locales: Locales, evaluator: Evaluator) {
         return this.node.getStartExplanations(
-            translation,
+            locales,
             evaluator.project.getNodeContext(this.node),
             evaluator
         );
diff --git a/src/runtime/Step.ts b/src/runtime/Step.ts
index b2e6bc505..029574b21 100644
--- a/src/runtime/Step.ts
+++ b/src/runtime/Step.ts
@@ -2,8 +2,8 @@ import Node from '@nodes/Node';
 import type Evaluator from '@runtime/Evaluator';
 import type Value from '../values/Value';
 import type Expression from '@nodes/Expression';
-import type Locale from '@locale/Locale';
 import type Markup from '../nodes/Markup';
+import type Locales from '../locale/Locales';
 
 /** Represents one step a compiled program's execution. */
 export default abstract class Step {
@@ -16,7 +16,7 @@ export default abstract class Step {
 
     abstract evaluate(evaluator: Evaluator): Value | undefined;
 
-    abstract getExplanations(translation: Locale, evaluator: Evaluator): Markup;
+    abstract getExplanations(locales: Locales, evaluator: Evaluator): Markup;
 
     toString() {
         return `${this.constructor.name} (${this.node.constructor.name}) ${
diff --git a/src/runtime/createDefaultShares.ts b/src/runtime/createDefaultShares.ts
index acaedce2a..42a84a6d8 100644
--- a/src/runtime/createDefaultShares.ts
+++ b/src/runtime/createDefaultShares.ts
@@ -20,7 +20,6 @@ import { createChoiceDefinition } from '../input/Choice';
 import { createGridType } from '../output/Grid';
 import { createRectangleType, createShapeType } from '../output/Shape';
 import { createFreeType } from '../output/Free';
-import type Locale from '../locale/Locale';
 import { createCameraDefinition } from '../input/Camera';
 import { createSequenceType } from '../output/Sequence';
 import { createPlacementDefinition } from '../input/Placement';
@@ -32,8 +31,10 @@ import { createVelocityType } from '../output/Velocity';
 import { createDirectionType } from '../output/Direction';
 import { createReboundType } from '../output/Rebound';
 import { createCollisionDefinition } from '../input/Collision';
+import type Locales from '../locale/Locales';
+import { createReactionDefinition } from '../values/ReactionStream';
 
-export default function createDefaultShares(locales: Locale[]) {
+export default function createDefaultShares(locales: Locales) {
     const PlaceType = createPlaceType(locales);
     const VelocityType = createVelocityType(locales);
     const MatterType = createMatterType(locales);
@@ -78,6 +79,7 @@ export default function createDefaultShares(locales: Locale[]) {
         Webpage: createWebpageDefinition(locales),
         Chat: createChatDefinition(locales),
         Collision: createCollisionDefinition(locales, ReboundType),
+        Reaction: createReactionDefinition(locales),
     };
 
     const Sequences = getDefaultSequences(locales);
diff --git a/src/runtime/evaluate.ts b/src/runtime/evaluate.ts
index 1efad3091..847f407c6 100644
--- a/src/runtime/evaluate.ts
+++ b/src/runtime/evaluate.ts
@@ -1,6 +1,6 @@
 import { DB } from '../db/Database';
 import DefaultLocale from '../locale/DefaultLocale';
-import type Locale from '../locale/Locale';
+import Locales from '../locale/Locales';
 import Project from '../models/Project';
 import Source from '../nodes/Source';
 import type Value from '../values/Value';
@@ -13,7 +13,7 @@ import Evaluator from './Evaluator';
 export default function evaluateCode(
     main: string,
     supplements?: string[],
-    locale?: Locale | Locale[]
+    locales?: Locales
 ): Value | undefined {
     const source = new Source('test', main);
     const project = Project.make(
@@ -23,15 +23,14 @@ export default function evaluateCode(
         (supplements ?? []).map(
             (code, index) => new Source(`sup${index + 1}`, code)
         ),
-        locale ?? DefaultLocale
+        locales?.getLocales() ?? DefaultLocale
     );
     return new Evaluator(
         project,
         DB,
-        locale === undefined
-            ? [DefaultLocale]
-            : Array.isArray(locale)
-            ? locale
-            : [locale]
+        new Locales(
+            locales === undefined ? [DefaultLocale] : locales.getLocales(),
+            DefaultLocale
+        )
     ).getInitialValue();
 }
diff --git a/src/util/verify-locales.ts b/src/util/verify-locales.ts
index eb5735031..74d306340 100644
--- a/src/util/verify-locales.ts
+++ b/src/util/verify-locales.ts
@@ -17,6 +17,7 @@ import type Node from '../nodes/Node';
 import { DOCS_SYMBOL } from '../parser/Symbols';
 import Project from '../models/Project';
 import { tokenize } from '../parser/Tokenizer';
+import { DefaultLocales } from '../locale/DefaultLocale';
 
 // Read in and compile the two schema
 const localeSchema = JSON.parse(
@@ -269,7 +270,7 @@ function verifyLocale(locale: Locale, warnUnwritten: boolean) {
         // If we can't, complain.
         else {
             const description = concretizeOrUndefined(
-                locale,
+                DefaultLocales,
                 value,
                 'test',
                 'test',
diff --git a/src/values/BlankException.ts b/src/values/BlankException.ts
index 584f0e2c6..4f968661e 100644
--- a/src/values/BlankException.ts
+++ b/src/values/BlankException.ts
@@ -1,9 +1,9 @@
-import type Locale from '@locale/Locale';
 import type Program from '../nodes/Program';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import concretize from '../locale/concretize';
 import type { ExceptionText } from '../locale/NodeTexts';
+import type Locales from '../locale/Locales';
 
 export default class BlankException extends ExceptionValue {
     readonly program: Program;
@@ -14,11 +14,11 @@ export default class BlankException extends ExceptionValue {
         this.program = program;
     }
 
-    getExceptionText(locale: Locale): ExceptionText {
-        return locale.node.Program.exception.BlankException;
+    getExceptionText(locales: Locales): ExceptionText {
+        return locales.get((l) => l.node.Program.exception.BlankException);
     }
 
-    getExplanation(locale: Locale) {
-        return concretize(locale, this.getExceptionText(locale).explanation);
+    getExplanation(locales: Locales) {
+        return concretize(locales, this.getExceptionText(locales).explanation);
     }
 }
diff --git a/src/values/BoolValue.ts b/src/values/BoolValue.ts
index 642887974..aa2b85539 100644
--- a/src/values/BoolValue.ts
+++ b/src/values/BoolValue.ts
@@ -7,9 +7,9 @@ import type Evaluator from '@runtime/Evaluator';
 import FunctionException from './FunctionException';
 import SimpleValue from './SimpleValue';
 import type Value from '../values/Value';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class BoolValue extends SimpleValue {
     readonly bool: boolean;
@@ -60,8 +60,11 @@ export default class BoolValue extends SimpleValue {
         return val instanceof BoolValue && this.bool === val.bool;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.boolean);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.boolean)
+        );
     }
 
     getSize() {
diff --git a/src/values/ConversionDefinitionValue.ts b/src/values/ConversionDefinitionValue.ts
index 365da162c..2a27bb2fb 100644
--- a/src/values/ConversionDefinitionValue.ts
+++ b/src/values/ConversionDefinitionValue.ts
@@ -5,8 +5,8 @@ import SimpleValue from './SimpleValue';
 import Value from '../values/Value';
 import { CONVERT_SYMBOL } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class ConversionDefinitionValue extends SimpleValue {
     /** The definition from the AST. */
@@ -44,8 +44,11 @@ export default class ConversionDefinitionValue extends SimpleValue {
         );
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.function);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.function)
+        );
     }
 
     getSize() {
diff --git a/src/values/ConversionException.ts b/src/values/ConversionException.ts
index e2f26d1ee..4428b706e 100644
--- a/src/values/ConversionException.ts
+++ b/src/values/ConversionException.ts
@@ -1,5 +1,4 @@
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import concretize from '../locale/concretize';
@@ -7,6 +6,7 @@ import type Type from '../nodes/Type';
 import ValueRef from '../locale/ValueRef';
 import type Value from '../values/Value';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class ConversionException extends ExceptionValue {
     readonly from: Value;
@@ -19,23 +19,23 @@ export default class ConversionException extends ExceptionValue {
         this.to = to;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Convert.exception.ConversionException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Convert.exception.ConversionException);
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             // Wrap the node containing the name in a link
             new ValueRef(
                 this.from,
-                locale,
+                locales,
                 this.evaluator.project.getNodeContext(this.creator)
             ),
             new NodeRef(
                 this.to,
-                locale,
+                locales,
                 this.evaluator.project.getNodeContext(this.creator)
             )
         );
diff --git a/src/values/CycleException.ts b/src/values/CycleException.ts
index 8d7f4ae68..597803c3b 100644
--- a/src/values/CycleException.ts
+++ b/src/values/CycleException.ts
@@ -1,9 +1,9 @@
 import type Borrow from '@nodes/Borrow';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class CycleException extends ExceptionValue {
     readonly borrow: Borrow;
@@ -14,17 +14,17 @@ export default class CycleException extends ExceptionValue {
         this.borrow = borrow;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Borrow.exception.CycleException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Borrow.exception.CycleException);
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             new NodeRef(
                 this.borrow,
-                locale,
+                locales,
                 this.evaluator.project.getNodeContext(this.borrow),
                 this.borrow.source?.getName()
             )
diff --git a/src/values/EvaluationLimitException.ts b/src/values/EvaluationLimitException.ts
index 7b92d5c73..a810a7a48 100644
--- a/src/values/EvaluationLimitException.ts
+++ b/src/values/EvaluationLimitException.ts
@@ -1,6 +1,5 @@
 import ExceptionValue from '@values/ExceptionValue';
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import type { DefinitionNode } from '@runtime/Evaluation';
 import NodeRef from '@locale/NodeRef';
 import FunctionDefinition from '@nodes/FunctionDefinition';
@@ -8,6 +7,7 @@ import StructureDefinition from '@nodes/StructureDefinition';
 import concretize from '../locale/concretize';
 import type Program from '../nodes/Program';
 import StreamDefinition from '../nodes/StreamDefinition';
+import type Locales from '../locale/Locales';
 
 export default class EvaluationLimitException extends ExceptionValue {
     readonly program: Program;
@@ -22,11 +22,13 @@ export default class EvaluationLimitException extends ExceptionValue {
         this.functions = functions;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Program.exception.EvaluationLimitException;
+    getExceptionText(locales: Locales) {
+        return locales.get(
+            (l) => l.node.Program.exception.EvaluationLimitException
+        );
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         const counts = new Map<DefinitionNode, number>();
         for (const fun of this.functions)
             counts.set(fun, (counts.get(fun) ?? 0) + 1);
@@ -35,16 +37,17 @@ export default class EvaluationLimitException extends ExceptionValue {
         const mostFrequent = sorted[0][0];
 
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             new NodeRef(
                 mostFrequent instanceof FunctionDefinition ||
                 mostFrequent instanceof StructureDefinition ||
                 mostFrequent instanceof StreamDefinition
-                    ? mostFrequent.names.getPreferredName(locale) ??
-                      mostFrequent
+                    ? mostFrequent.names.getPreferredName(
+                          locales.getLocales()
+                      ) ?? mostFrequent
                     : mostFrequent,
-                locale,
+                locales,
                 this.getNodeContext(mostFrequent)
             )
         );
diff --git a/src/values/ExceptionValue.ts b/src/values/ExceptionValue.ts
index a00deaa9c..c2d63e02c 100644
--- a/src/values/ExceptionValue.ts
+++ b/src/values/ExceptionValue.ts
@@ -5,10 +5,10 @@ import type Evaluator from '@runtime/Evaluator';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import type Node from '@nodes/Node';
 import type Expression from '../nodes/Expression';
-import type Locale from '../locale/Locale';
 import type { ExceptionText } from '../locale/NodeTexts';
 import type Markup from '../nodes/Markup';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default abstract class ExceptionValue extends SimpleValue {
     readonly evaluator: Evaluator;
@@ -33,13 +33,13 @@ export default abstract class ExceptionValue extends SimpleValue {
         return new ExceptionType(this);
     }
 
-    abstract getExceptionText(locale: Locale): ExceptionText;
+    abstract getExceptionText(locales: Locales): ExceptionText;
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, this.getExceptionText(locale).description);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(locales, this.getExceptionText(locales).description);
     }
 
-    abstract getExplanation(locale: Locale): Markup;
+    abstract getExplanation(locales: Locales): Markup;
 
     getBasisTypeName(): BasisTypeName {
         return 'exception';
diff --git a/src/values/FunctionException.ts b/src/values/FunctionException.ts
index 10b71c1d4..c1df4afb9 100644
--- a/src/values/FunctionException.ts
+++ b/src/values/FunctionException.ts
@@ -4,12 +4,12 @@ import type Evaluate from '@nodes/Evaluate';
 import type Token from '@nodes/Token';
 import type UnaryEvaluate from '@nodes/UnaryEvaluate';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import type Value from '../values/Value';
 import concretize from '../locale/concretize';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class FunctionException extends ExceptionValue {
     readonly subject: Value | undefined;
@@ -29,18 +29,18 @@ export default class FunctionException extends ExceptionValue {
         this.verb = verb;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Evaluate.exception.FunctionException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Evaluate.exception.FunctionException);
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             // Wrap the node containing the name in a link
             new NodeRef(
                 this.verb,
-                locale,
+                locales,
                 this.evaluator.project.getNodeContext(this.node)
             ),
             // Wrap the type, if there is one
@@ -52,7 +52,7 @@ export default class FunctionException extends ExceptionValue {
                               this.subject.creator
                           )
                       ),
-                      locale,
+                      locales,
                       this.evaluator.project.getNodeContext(
                           this.subject.creator
                       )
diff --git a/src/values/FunctionValue.ts b/src/values/FunctionValue.ts
index 9735433a1..34aa58fcc 100644
--- a/src/values/FunctionValue.ts
+++ b/src/values/FunctionValue.ts
@@ -4,8 +4,8 @@ import type FunctionDefinition from '@nodes/FunctionDefinition';
 import { FUNCTION_SYMBOL } from '@parser/Symbols';
 import type Evaluation from '@runtime/Evaluation';
 import Value from '@values/Value';
-import type Locale from '@locale/Locale';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 // We could have just called this Function, but Javascript claims that globally.
 export default class FunctionValue extends Value {
@@ -39,10 +39,12 @@ export default class FunctionValue extends Value {
         return undefined;
     }
 
-    toWordplay(locales: Locale[]) {
-        return `${FUNCTION_SYMBOL} ${this.definition.names.getPreferredNameString(
+    toWordplay(locales: Locales) {
+        return `${FUNCTION_SYMBOL} ${
             locales
-        )}()`;
+                ? locales.getName(this.definition.names)
+                : this.definition.names.getNames()[0]
+        }()`;
     }
 
     isEqualTo(value: Value): boolean {
@@ -52,8 +54,11 @@ export default class FunctionValue extends Value {
         );
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.function);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.function)
+        );
     }
 
     getSize() {
diff --git a/src/values/ListValue.ts b/src/values/ListValue.ts
index 9626ee348..5e58c9fa1 100644
--- a/src/values/ListValue.ts
+++ b/src/values/ListValue.ts
@@ -9,9 +9,9 @@ import UnionType from '@nodes/UnionType';
 import type Context from '@nodes/Context';
 import { LIST_CLOSE_SYMBOL, LIST_OPEN_SYMBOL } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class ListValue extends SimpleValue {
     readonly values: Value[] = [];
@@ -152,14 +152,17 @@ export default class ListValue extends SimpleValue {
         return 'list';
     }
 
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales: Locales): string {
         return `${LIST_OPEN_SYMBOL}${Array.from(this.values)
             .map((value) => value.toWordplay(locales))
             .join(' ')}${LIST_CLOSE_SYMBOL}`;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.list);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.list)
+        );
     }
 
     getSize() {
diff --git a/src/values/MapValue.ts b/src/values/MapValue.ts
index 7096766cc..6578b8c76 100644
--- a/src/values/MapValue.ts
+++ b/src/values/MapValue.ts
@@ -11,9 +11,9 @@ import {
     SET_OPEN_SYMBOL,
 } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class MapValue extends SimpleValue {
     readonly values: [Value, Value][];
@@ -111,7 +111,7 @@ export default class MapValue extends SimpleValue {
         return 'map';
     }
 
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales: Locales): string {
         return `${SET_OPEN_SYMBOL}${this.values
             .map(
                 ([key, value]) =>
@@ -122,8 +122,11 @@ export default class MapValue extends SimpleValue {
             .join(' ')}${SET_CLOSE_SYMBOL}`;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.map);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.map)
+        );
     }
 
     getSize() {
diff --git a/src/values/MarkupValue.ts b/src/values/MarkupValue.ts
index 8f4450c83..e19762dc4 100644
--- a/src/values/MarkupValue.ts
+++ b/src/values/MarkupValue.ts
@@ -1,4 +1,3 @@
-import type Locale from '../locale/Locale';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import FormattedType from '../nodes/FormattedType';
 import type Markup from '../nodes/Markup';
@@ -7,6 +6,7 @@ import SimpleValue from './SimpleValue';
 import type Value from '../values/Value';
 import type FormattedLiteral from '../nodes/FormattedLiteral';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class MarkupValue extends SimpleValue {
     readonly markup: Markup;
@@ -30,8 +30,11 @@ export default class MarkupValue extends SimpleValue {
         );
     }
 
-    getDescription(concretize: Concretizer, locale: Locale): Markup {
-        return concretize(locale, locale.node.Docs.name);
+    getDescription(concretize: Concretizer, locales: Locales): Markup {
+        return concretize(
+            locales,
+            locales.get((l) => l.node.Docs.name)
+        );
     }
 
     getSize(): number {
diff --git a/src/values/MessageException.ts b/src/values/MessageException.ts
index 65c748e51..208199e90 100644
--- a/src/values/MessageException.ts
+++ b/src/values/MessageException.ts
@@ -1,8 +1,8 @@
 import ExceptionValue from '@values/ExceptionValue';
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import type Expression from '@nodes/Expression';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class MessageException extends ExceptionValue {
     readonly message: string;
@@ -15,7 +15,7 @@ export default class MessageException extends ExceptionValue {
         return { description: this.message, explanation: this.message };
     }
 
-    getExplanation(locale: Locale) {
-        return concretize(locale, this.getExceptionText().explanation);
+    getExplanation(locales: Locales) {
+        return concretize(locales, this.getExceptionText().explanation);
     }
 }
diff --git a/src/values/NameException.ts b/src/values/NameException.ts
index ea833ba13..2e516edc1 100644
--- a/src/values/NameException.ts
+++ b/src/values/NameException.ts
@@ -1,12 +1,12 @@
 import ExceptionValue from '@values/ExceptionValue';
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import type Token from '@nodes/Token';
 import Value from '../values/Value';
 import NodeRef from '@locale/NodeRef';
 import ValueRef from '@locale/ValueRef';
 import concretize from '../locale/concretize';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class NameException extends ExceptionValue {
     readonly name: Token | undefined;
@@ -24,18 +24,18 @@ export default class NameException extends ExceptionValue {
         this.scope = scope;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Reference.exception.NameException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Reference.exception.NameException);
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             this.name
                 ? new NodeRef(
                       this.name,
-                      locale,
+                      locales,
                       this.getNodeContext(this.name),
                       this.name.getText()
                   )
@@ -43,7 +43,7 @@ export default class NameException extends ExceptionValue {
             this.scope instanceof Value
                 ? new ValueRef(
                       this.scope,
-                      locale,
+                      locales,
                       this.getNodeContext(this.scope.creator)
                   )
                 : undefined
diff --git a/src/values/NoneValue.ts b/src/values/NoneValue.ts
index d33c9cb7f..d9db961a6 100644
--- a/src/values/NoneValue.ts
+++ b/src/values/NoneValue.ts
@@ -3,9 +3,9 @@ import { NONE_SYMBOL } from '@parser/Symbols';
 import type Value from '../values/Value';
 import type { BasisTypeName } from '../basis/BasisConstants';
 import SimpleValue from './SimpleValue';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class NoneValue extends SimpleValue {
     constructor(creator: Expression) {
@@ -28,8 +28,11 @@ export default class NoneValue extends SimpleValue {
         return NONE_SYMBOL;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.none);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.none)
+        );
     }
 
     getSize() {
diff --git a/src/values/NumberValue.ts b/src/values/NumberValue.ts
index 2560a4513..a7fa74068 100644
--- a/src/values/NumberValue.ts
+++ b/src/values/NumberValue.ts
@@ -8,9 +8,9 @@ import SimpleValue from './SimpleValue';
 import NumberType from '@nodes/NumberType';
 import type Value from '../values/Value';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export type NumberAndPrecision = [Decimal, number | undefined];
 
@@ -253,8 +253,11 @@ export default class NumberValue extends SimpleValue {
         }${this.unit.toString()}`;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.number);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.number)
+        );
     }
 
     getSize() {
diff --git a/src/values/ReactionStream.ts b/src/values/ReactionStream.ts
index b6a2b5f87..52d9b64e0 100644
--- a/src/values/ReactionStream.ts
+++ b/src/values/ReactionStream.ts
@@ -9,12 +9,18 @@ import type Evaluator from '@runtime/Evaluator';
 import StreamValue from '@values/StreamValue';
 import type Value from '@values/Value';
 import { STREAM_SYMBOL } from '../parser/Symbols';
+import type Locales from '../locale/Locales';
 
 export default class ReactionStream extends StreamValue<Value, null> {
     readonly reaction: Reaction;
 
     constructor(evaluator: Evaluator, reaction: Reaction, initialValue: Value) {
-        super(evaluator, ReactionDefinition, initialValue, null);
+        super(
+            evaluator,
+            evaluator.project.basis.shares.input.Reaction,
+            initialValue,
+            null
+        );
 
         this.reaction = reaction;
     }
@@ -35,10 +41,12 @@ export default class ReactionStream extends StreamValue<Value, null> {
 }
 
 /** This isn't ever actually used, it's just here to meet the requirements of the Stream interface. */
-const ReactionDefinition = StreamDefinition.make(
-    getDocLocales([], (t) => t.node.Reaction.doc),
-    getNameLocales([], () => STREAM_SYMBOL),
-    [],
-    ExpressionPlaceholder.make(),
-    new AnyType()
-);
+export function createReactionDefinition(locales: Locales) {
+    return StreamDefinition.make(
+        getDocLocales(locales, (t) => t.node.Reaction.doc),
+        getNameLocales(locales, () => STREAM_SYMBOL),
+        [],
+        ExpressionPlaceholder.make(),
+        new AnyType()
+    );
+}
diff --git a/src/values/SetValue.ts b/src/values/SetValue.ts
index 5848f2a87..e58d7b7a8 100644
--- a/src/values/SetValue.ts
+++ b/src/values/SetValue.ts
@@ -7,9 +7,9 @@ import SimpleValue from './SimpleValue';
 import type Value from '@values/Value';
 import { SET_CLOSE_SYMBOL, SET_OPEN_SYMBOL } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class SetValue extends SimpleValue {
     readonly values: Value[];
@@ -97,14 +97,17 @@ export default class SetValue extends SimpleValue {
         return 'set';
     }
 
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales: Locales): string {
         return `${SET_OPEN_SYMBOL}${Array.from(this.values)
             .map((value) => value.toWordplay(locales))
             .join(' ')}${SET_CLOSE_SYMBOL}`;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.set);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.set)
+        );
     }
 
     getSize() {
diff --git a/src/values/StepLimitException.ts b/src/values/StepLimitException.ts
index c2c03890a..c35e58efc 100644
--- a/src/values/StepLimitException.ts
+++ b/src/values/StepLimitException.ts
@@ -1,8 +1,8 @@
 import ExceptionValue from '@values/ExceptionValue';
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import concretize from '../locale/concretize';
 import type Program from '../nodes/Program';
+import type Locales from '../locale/Locales';
 
 export default class StepLimitException extends ExceptionValue {
     readonly program: Program;
@@ -11,11 +11,11 @@ export default class StepLimitException extends ExceptionValue {
         this.program = program;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Program.exception.StepLimitException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Program.exception.StepLimitException);
     }
 
-    getExplanation(locale: Locale) {
-        return concretize(locale, this.getExceptionText(locale).explanation);
+    getExplanation(locales: Locales) {
+        return concretize(locales, this.getExceptionText(locales).explanation);
     }
 }
diff --git a/src/values/StreamDefinitionValue.ts b/src/values/StreamDefinitionValue.ts
index 9d8dc4a32..1ae153ebe 100644
--- a/src/values/StreamDefinitionValue.ts
+++ b/src/values/StreamDefinitionValue.ts
@@ -2,10 +2,10 @@ import SimpleValue from './SimpleValue';
 import type Value from '@values/Value';
 import { STREAM_SYMBOL } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import StreamType from '../nodes/StreamType';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class StreamDefinitionValue extends SimpleValue {
     /** The definition from the AST. */
@@ -25,10 +25,12 @@ export default class StreamDefinitionValue extends SimpleValue {
         return 'streamdefinition';
     }
 
-    toWordplay(locales: Locale[]) {
-        return `${STREAM_SYMBOL}${this.definition.names.getPreferredNameString(
+    toWordplay(locales?: Locales) {
+        return `${STREAM_SYMBOL}${
             locales
-        )}`;
+                ? locales.getName(this.definition.names)
+                : this.definition.names.getNames()[0]
+        }`;
     }
 
     isEqualTo(value: Value): boolean {
@@ -38,8 +40,11 @@ export default class StreamDefinitionValue extends SimpleValue {
         );
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.function);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.function)
+        );
     }
 
     getSize() {
diff --git a/src/values/StreamValue.ts b/src/values/StreamValue.ts
index 838b70445..37e153bce 100644
--- a/src/values/StreamValue.ts
+++ b/src/values/StreamValue.ts
@@ -5,11 +5,11 @@ import type Value from '@values/Value';
 import type Evaluator from '@runtime/Evaluator';
 import type { StepNumber } from '@runtime/Evaluator';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type StreamDefinition from '../nodes/StreamDefinition';
 import type Expression from '../nodes/Expression';
 import ListValue from '@values/ListValue';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export const MAX_STREAM_LENGTH = 256;
 
@@ -48,12 +48,12 @@ export default abstract class StreamValue<
         this.add(initalValue, initialRaw);
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
+    getDescription(concretize: Concretizer, locales: Locales) {
         return concretize(
-            locale,
+            locales,
             this.definition.docs
-                ?.getPreferredLocale(locale)
-                ?.getFirstParagraph() ?? locale.term.stream
+                ?.getPreferredLocale(locales)
+                ?.getFirstParagraph() ?? locales.get((l) => l.term.stream)
         );
     }
 
@@ -159,12 +159,12 @@ export default abstract class StreamValue<
     }
 
     /** Should produce valid Wordplay code string representing the stream's name */
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales: Locales): string {
         return this.getPreferredName(locales);
     }
 
-    getPreferredName(locales: Locale[]) {
-        return this.definition.names.getPreferredNameString(locales);
+    getPreferredName(locales: Locales) {
+        return locales.getName(this.definition.names);
     }
 
     /** Should return named values on the stream. */
diff --git a/src/values/StructureDefinitionValue.ts b/src/values/StructureDefinitionValue.ts
index c559251a7..a8afbe931 100644
--- a/src/values/StructureDefinitionValue.ts
+++ b/src/values/StructureDefinitionValue.ts
@@ -5,8 +5,8 @@ import SimpleValue from './SimpleValue';
 import type Value from '@values/Value';
 import { TYPE_SYMBOL } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class StructureDefinitionValue extends SimpleValue {
     /** The definition from the AST. */
@@ -30,10 +30,12 @@ export default class StructureDefinitionValue extends SimpleValue {
         return 'structure';
     }
 
-    toWordplay(locales: Locale[]) {
-        return `${TYPE_SYMBOL}${this.definition.names.getPreferredNameString(
+    toWordplay(locales?: Locales) {
+        return `${TYPE_SYMBOL}${
             locales
-        )}`;
+                ? locales.getName(this.definition.names)
+                : this.definition.getNames()[0]
+        }`;
     }
 
     isEqualTo(value: Value): boolean {
@@ -44,8 +46,11 @@ export default class StructureDefinitionValue extends SimpleValue {
         );
     }
 
-    getDescription(concretize: Concretizer, translation: Locale) {
-        return concretize(translation, translation.term.function);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.function)
+        );
     }
 
     getSize() {
diff --git a/src/values/StructureValue.ts b/src/values/StructureValue.ts
index 0ff65c872..9cda4be7c 100644
--- a/src/values/StructureValue.ts
+++ b/src/values/StructureValue.ts
@@ -16,9 +16,9 @@ import {
     EVAL_OPEN_SYMBOL,
 } from '@parser/Symbols';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class StructureValue extends Value {
     readonly type: StructureDefinition;
@@ -150,20 +150,27 @@ export default class StructureValue extends Value {
         return this.context.getConversion(input, output);
     }
 
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales?: Locales): string {
         const bindings = this.type.inputs.map(
             (bind) =>
-                `${bind.names.getPreferredNameString(
+                `${
                     locales
-                )}${BIND_SYMBOL} ${this.resolve(bind.getNames()[0])}`
+                        ? locales.getName(bind.names)
+                        : bind.names.getNames()[0]
+                }${BIND_SYMBOL} ${this.resolve(bind.getNames()[0])}`
         );
-        return `${this.type.names.getPreferredNameString(
+        return `${
             locales
-        )}${EVAL_OPEN_SYMBOL}${bindings.join(' ')}${EVAL_CLOSE_SYMBOL}`;
+                ? locales.getName(this.type.names)
+                : this.type.names.getNames()[0]
+        }${EVAL_OPEN_SYMBOL}${bindings.join(' ')}${EVAL_CLOSE_SYMBOL}`;
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.structure);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.structure)
+        );
     }
 
     /**
diff --git a/src/values/TableValue.ts b/src/values/TableValue.ts
index 492134e9e..4998a5b27 100644
--- a/src/values/TableValue.ts
+++ b/src/values/TableValue.ts
@@ -3,11 +3,11 @@ import TableType from '@nodes/TableType';
 import { TABLE_CLOSE_SYMBOL, TABLE_OPEN_SYMBOL } from '@parser/Symbols';
 import type ExceptionValue from '@values/ExceptionValue';
 import type Value from '@values/Value';
-import type Locale from '@locale/Locale';
 import SimpleValue from './SimpleValue';
 import type StructureValue from '@values/StructureValue';
 import type Expression from '../nodes/Expression';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class TableValue extends SimpleValue {
     readonly type: TableType;
@@ -45,7 +45,7 @@ export default class TableValue extends SimpleValue {
         );
     }
 
-    toWordplay(locales: Locale[]): string {
+    toWordplay(locales?: Locales): string {
         const columns = this.type.columns;
         let text = '';
         for (const row of this.rows) {
@@ -57,8 +57,11 @@ export default class TableValue extends SimpleValue {
         return text.trim();
     }
 
-    getDescription(concretize: Concretizer, locale: Locale) {
-        return concretize(locale, locale.term.table);
+    getDescription(concretize: Concretizer, locales: Locales) {
+        return concretize(
+            locales,
+            locales.get((l) => l.term.table)
+        );
     }
 
     getSize() {
diff --git a/src/values/TextValue.ts b/src/values/TextValue.ts
index 6f860e9de..ab88b1a74 100644
--- a/src/values/TextValue.ts
+++ b/src/values/TextValue.ts
@@ -4,12 +4,12 @@ import NumberValue from '@values/NumberValue';
 import SimpleValue from './SimpleValue';
 import type Value from '@values/Value';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import ListValue from '@values/ListValue';
 import BoolValue from '@values/BoolValue';
 import UnicodeString from '../models/UnicodeString';
 import type Concretizer from '../nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 export default class TextValue extends SimpleValue {
     readonly text: string;
@@ -98,8 +98,11 @@ export default class TextValue extends SimpleValue {
         return new NumberValue(requestor, sum);
     }
 
-    getDescription(concretizer: Concretizer, locale: Locale) {
-        return concretizer(locale, locale.term.text);
+    getDescription(concretizer: Concretizer, locales: Locales) {
+        return concretizer(
+            locales,
+            locales.get((l) => l.term.text)
+        );
     }
 
     getSize() {
diff --git a/src/values/TypeException.ts b/src/values/TypeException.ts
index 445975779..e5edd49e4 100644
--- a/src/values/TypeException.ts
+++ b/src/values/TypeException.ts
@@ -1,12 +1,12 @@
 import type Type from '@nodes/Type';
 import NodeRef from '@locale/NodeRef';
-import type Locale from '@locale/Locale';
 import ValueRef from '@locale/ValueRef';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import type Value from '@values/Value';
 import concretize from '../locale/concretize';
 import type Expression from '../nodes/Expression';
+import type Locales from '../locale/Locales';
 
 export default class TypeException extends ExceptionValue {
     readonly expected: Type;
@@ -24,22 +24,22 @@ export default class TypeException extends ExceptionValue {
         this.received = received;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Is.exception.TypeException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Is.exception.TypeException);
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             new NodeRef(
                 this.expected,
-                locale,
+                locales,
                 this.getNodeContext(this.expected)
             ),
             new ValueRef(
                 this.received,
-                locale,
+                locales,
                 this.getNodeContext(this.received.creator)
             )
         );
diff --git a/src/values/UnimplementedException.ts b/src/values/UnimplementedException.ts
index d238c06a6..122eff8fe 100644
--- a/src/values/UnimplementedException.ts
+++ b/src/values/UnimplementedException.ts
@@ -1,9 +1,9 @@
-import type Locale from '@locale/Locale';
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
 import type Expression from '@nodes/Expression';
 import NodeRef from '@locale/NodeRef';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnimplementedException extends ExceptionValue {
     readonly placeholder: Expression;
@@ -12,18 +12,18 @@ export default class UnimplementedException extends ExceptionValue {
         this.placeholder = placeholder;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.ExpressionPlaceholder.exception
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.ExpressionPlaceholder.exception)
             .UnimplementedException;
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             new NodeRef(
                 this.placeholder,
-                locale,
+                locales,
                 this.getNodeContext(this.placeholder)
             )
         );
diff --git a/src/values/UnparsableException.ts b/src/values/UnparsableException.ts
index 65fd1d4c8..ea69102d1 100644
--- a/src/values/UnparsableException.ts
+++ b/src/values/UnparsableException.ts
@@ -1,9 +1,9 @@
 import type Evaluator from '@runtime/Evaluator';
 import ExceptionValue from '@values/ExceptionValue';
-import type Locale from '@locale/Locale';
 import type Expression from '@nodes/Expression';
 import NodeRef from '@locale/NodeRef';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class UnparsableException extends ExceptionValue {
     readonly unparsable: Expression;
@@ -14,17 +14,19 @@ export default class UnparsableException extends ExceptionValue {
         this.unparsable = unparsable;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.UnparsableExpression.exception.UnparsableException;
+    getExceptionText(locales: Locales) {
+        return locales.get(
+            (l) => l.node.UnparsableExpression.exception.UnparsableException
+        );
     }
 
-    getExplanation(locale: Locale) {
+    getExplanation(locales: Locales) {
         return concretize(
-            locale,
-            this.getExceptionText(locale).explanation,
+            locales,
+            this.getExceptionText(locales).explanation,
             new NodeRef(
                 this.unparsable,
-                locale,
+                locales,
                 this.getNodeContext(this.unparsable)
             )
         );
diff --git a/src/values/Value.ts b/src/values/Value.ts
index cd76a1ce3..1b790a5ec 100644
--- a/src/values/Value.ts
+++ b/src/values/Value.ts
@@ -2,10 +2,10 @@ import type Context from '@nodes/Context';
 import type Type from '@nodes/Type';
 import type Evaluator from '@runtime/Evaluator';
 import type { BasisTypeName } from '../basis/BasisConstants';
-import type Locale from '@locale/Locale';
 import type Expression from '../nodes/Expression';
 import type Markup from '../nodes/Markup';
 import type Concretizer from '@nodes/Concretizer';
+import type Locales from '../locale/Locales';
 
 /** Used to uniquely distinguish values. */
 let VALUE_ID = 0;
@@ -20,10 +20,10 @@ export default abstract class Value {
 
     /** Returns a Wordplay sytnax representation of the value. */
     toString(): string {
-        return this.toWordplay([]);
+        return this.toWordplay();
     }
 
-    abstract toWordplay(locales: Locale[]): string;
+    abstract toWordplay(locales?: Locales): string;
 
     /** Returns the Structure defining this value's interface. */
     abstract getType(context: Context): Type;
@@ -35,7 +35,7 @@ export default abstract class Value {
 
     abstract isEqualTo(value: Value): boolean;
 
-    abstract getDescription(concretizer: Concretizer, locale: Locale): Markup;
+    abstract getDescription(concretizer: Concretizer, locales: Locales): Markup;
 
     /**
      * Should returns a rough estimate of how much memory this value uses.
diff --git a/src/values/ValueException.ts b/src/values/ValueException.ts
index b81a4f729..5cb36a69e 100644
--- a/src/values/ValueException.ts
+++ b/src/values/ValueException.ts
@@ -1,8 +1,8 @@
 import ExceptionValue from '@values/ExceptionValue';
 import type Evaluator from '@runtime/Evaluator';
-import type Locale from '@locale/Locale';
 import type Expression from '@nodes/Expression';
 import concretize from '../locale/concretize';
+import type Locales from '../locale/Locales';
 
 export default class ValueException extends ExceptionValue {
     readonly expression: Expression;
@@ -11,11 +11,11 @@ export default class ValueException extends ExceptionValue {
         this.expression = expression;
     }
 
-    getExceptionText(locale: Locale) {
-        return locale.node.Program.exception.ValueException;
+    getExceptionText(locales: Locales) {
+        return locales.get((l) => l.node.Program.exception.ValueException);
     }
 
-    getExplanation(locale: Locale) {
-        return concretize(locale, this.getExceptionText(locale).explanation);
+    getExplanation(locales: Locales) {
+        return concretize(locales, this.getExceptionText(locales).explanation);
     }
 }