diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7512530..2334c8c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Contributing to mdbook-quiz
 
-Thanks for your interest in contributing to mdbook-quiz! To get started, you'll want to install [cargo-make](https://github.com/sagiegurari/cargo-make) and [pnpm](https://pnpm.io/installation). Then from the root of the repository, run:
+Thanks for your interest in contributing to mdbook-quiz! To get started, you'll want to install, [graco](https://github.com/willcrichton/graco), [cargo-watch](https://github.com/watchexec/cargo-watch.git),  [cargo-make](https://github.com/sagiegurari/cargo-make) and [pnpm](https://pnpm.io/installation). Then from the root of the repository, run:
 
 ```
 cargo make watch
diff --git a/example/src/quiz.toml b/example/src/quiz.toml
index 3029cf5..b864f5d 100644
--- a/example/src/quiz.toml
+++ b/example/src/quiz.toml
@@ -1,6 +1,23 @@
 [[questions]]
 type = "MultipleChoice"
-prompt.prompt = "What does it mean if a variable `x` is immutable?"
+prompt.prompt = """
+What does it mean if a variable `x` is immutable?
+
+Rust:
+```rust
+let x = 0;
+```
+
+C++:
+```cpp
+const int x = 0;
+```
+
+Java:
+```java
+final int x = 0;
+```
+"""
 answer.answer = "`x` cannot be changed after being assigned to a value."
 prompt.distractors = [
   "`x` is stored in the immutable region of memory.",
@@ -21,6 +38,7 @@ For example, you can make a mutable variable `x` by writing: `let mut x = 1`.
 
 [[questions]]
 type = "Tracing"
+prompt.language="rust"
 prompt.program = """
 fn main() {
   let x = 1;
@@ -33,4 +51,24 @@ answer.doesCompile = false
 answer.lineNumber = 4
 context = """
 This is a compiler error because line 4 tries to mutate `x` when `x` is not marked as `mut`.
+"""
+
+[[questions]]
+type = "Tracing"
+prompt.language="cpp"
+prompt.program = """
+
+#include <iostream>
+
+int main() {
+  const int x = 1;
+  std::cout << x << std::endl;
+  x += 1;
+  std::cout << x << std::endl;
+}
+"""
+answer.doesCompile = false
+answer.lineNumber = 6
+context = """
+This is a compiler error because line 6 tries to mutate `x` when `x` is marked as `const`.
 """
\ No newline at end of file
diff --git a/js/packages/quiz-schema/src/tracing.ts b/js/packages/quiz-schema/src/tracing.ts
index 01bd14d..f807ce5 100644
--- a/js/packages/quiz-schema/src/tracing.ts
+++ b/js/packages/quiz-schema/src/tracing.ts
@@ -3,6 +3,8 @@ import { QuestionFields } from "./common";
 export interface TracingPrompt {
   /** The contents of the program to trace */
   program: string;
+
+  language?: string;
 }
 
 export interface TracingAnswer {
diff --git a/js/packages/quiz/src/components/snippet.tsx b/js/packages/quiz/src/components/snippet.tsx
index 52a88ff..a90b913 100644
--- a/js/packages/quiz/src/components/snippet.tsx
+++ b/js/packages/quiz/src/components/snippet.tsx
@@ -1,16 +1,12 @@
 import * as rustEditor from "@wcrichto/rust-editor";
 import type { monaco } from "@wcrichto/rust-editor";
 //@ts-ignore
-import hljs from "highlight.js/lib/core";
-//@ts-ignore
-import rust from "highlight.js/lib/languages/rust";
+import hljs from "highlight.js";
 //@ts-ignore
 import lean from "highlightjs-lean";
 import React, { useContext, useEffect, useRef } from "react";
 import ReactDOM from "react-dom/client";
 
-// This reduces bundle size by not including a bunch of extra languages
-hljs.registerLanguage("rust", rust);
 hljs.registerLanguage("lean", lean);
 
 export let DefaultLanguageContext = React.createContext<string | undefined>(
diff --git a/js/packages/quiz/src/questions/tracing.tsx b/js/packages/quiz/src/questions/tracing.tsx
index 9d21945..2dde255 100644
--- a/js/packages/quiz/src/questions/tracing.tsx
+++ b/js/packages/quiz/src/questions/tracing.tsx
@@ -30,7 +30,11 @@ export let TracingMethods: QuestionMethods<TracingPrompt, TracingAnswer> = {
         {/* If the program does not pass, indicate the last line number involved in the
         compiler error. */}
       </p>
-      <Snippet snippet={prompt.program} lineNumbers />
+      <Snippet
+        language={prompt.language}
+        snippet={prompt.program}
+        lineNumbers
+      />
     </>
   ),