diff --git a/src/Extension/FluentExtension.php b/src/Extension/FluentExtension.php
index 627f0fcb..88b46c44 100644
--- a/src/Extension/FluentExtension.php
+++ b/src/Extension/FluentExtension.php
@@ -981,10 +981,14 @@ protected function getRecordLocale()
 
     /**
      * Returns the source locale that will display the content for this record
+     * Source locale for frontend context is used by default as this is the most common use,
+     * but you can optionally specify CMS context as well
+     * Passing null will fall back to whatever context is currently in use
      *
+     * @param bool|null $isFrontend
      * @return Locale|null
      */
-    public function getSourceLocale(): ?Locale
+    public function getSourceLocale(?bool $isFrontend = true): ?Locale
     {
         $owner = $this->owner;
         $currentLocale = FluentState::singleton()->getLocale();
@@ -995,7 +999,7 @@ public function getSourceLocale(): ?Locale
         }
 
         $localeInformation = $owner->LocaleInformation($currentLocale);
-        $sourceLocale = $localeInformation->getSourceLocale();
+        $sourceLocale = $localeInformation->getSourceLocale($isFrontend);
         if ($sourceLocale) {
             return Locale::getByLocale($sourceLocale);
         }
diff --git a/src/Model/RecordLocale.php b/src/Model/RecordLocale.php
index 74f3a4f0..b21fa432 100644
--- a/src/Model/RecordLocale.php
+++ b/src/Model/RecordLocale.php
@@ -362,16 +362,23 @@ public function getStagesDiffer(): bool
 
     /**
      * Get the locale which is the source of content for this record
+     * Source locale for frontend context is used by default as this is the most common use,
+     * but you can optionally specify CMS context as well
+     * Passing null will fall back to whatever context is currently in use
      *
+     * @param bool|null $isFrontend
      * @return Locale|null
      */
-    public function getSourceLocale(): ?Locale
+    public function getSourceLocale(?bool $isFrontend = true): ?Locale
     {
+        $isFrontendFromState = FluentState::singleton()->getIsFrontend();
+        $isFrontend ??= $isFrontendFromState;
+
         /** @var DataObject|FluentExtension $record */
         $record = $this->getOriginalRecord();
         $config = $record->config();
 
-        $inheritanceMode = FluentState::singleton()->getIsFrontend()
+        $inheritanceMode = $isFrontend
             ? $config->get('frontend_publish_required')
             : $config->get('cms_localisation_required');
 
diff --git a/tests/php/Extension/LocaleInheritanceTest.php b/tests/php/Extension/LocaleInheritanceTest.php
index ce2e8fed..2b617887 100644
--- a/tests/php/Extension/LocaleInheritanceTest.php
+++ b/tests/php/Extension/LocaleInheritanceTest.php
@@ -5,22 +5,11 @@
 use Page;
 use SilverStripe\CMS\Model\SiteTree;
 use SilverStripe\Dev\SapphireTest;
-use SilverStripe\ORM\DataObject;
-use SilverStripe\ORM\Queries\SQLSelect;
 use SilverStripe\ORM\ValidationException;
 use SilverStripe\Versioned\Versioned;
 use TractorCow\Fluent\Extension\FluentExtension;
 use TractorCow\Fluent\Extension\FluentSiteTreeExtension;
-use TractorCow\Fluent\Model\Locale;
 use TractorCow\Fluent\State\FluentState;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\LocalisedAnother;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\LocalisedChild;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\LocalisedParent;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\MixedLocalisedSortObject;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\TestModel;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\TestRelationPage;
-use TractorCow\Fluent\Tests\Extension\FluentExtensionTest\UnlocalisedChild;
-use TractorCow\Fluent\Tests\Extension\Stub\FluentStubObject;
 
 class LocaleInheritanceTest extends SapphireTest
 {
@@ -60,7 +49,9 @@ public function testGetSourceLocale(
             // Create the page in the default locale
             FluentState::singleton()->withState(
                 function (FluentState $state) use ($frontendContext, $locale, $expected): void {
-                    $state->setLocale('en_US');
+                    $state
+                        ->setLocale('en_US')
+                        ->setIsFrontend($frontendContext);
 
                     /** @var Page|FluentExtension $page */
                     $page = Page::create();
@@ -68,10 +59,8 @@ function (FluentState $state) use ($frontendContext, $locale, $expected): void {
                     $page->URLSegment = 'test-page';
                     $page->write();
 
-                    $state->setIsFrontend($frontendContext);
-
                     $localeInformation = $page->LocaleInformation($locale);
-                    $sourceLocaleObject = $localeInformation->getSourceLocale();
+                    $sourceLocaleObject = $localeInformation->getSourceLocale($frontendContext);
                     $sourceLocale = $sourceLocaleObject?->Locale;
                     $this->assertEquals(
                         $expected,
@@ -90,7 +79,7 @@ function (FluentState $state) use ($frontendContext, $locale, $expected): void {
                     $page = Page::get()->byID($page->ID);
 
                     $this->assertNotNull($page, 'We expect the page to be available in this locale');
-                    $sourceLocaleObject = $page->getSourceLocale();
+                    $sourceLocaleObject = $page->getSourceLocale($frontendContext);
                     $this->assertEquals(
                         $expected,
                         $sourceLocaleObject->Locale,