diff --git a/src/content/docs/en/guides/markdown-content.mdx b/src/content/docs/en/guides/markdown-content.mdx
index cc2347e8961ed..e5ee46a8d405d 100644
--- a/src/content/docs/en/guides/markdown-content.mdx
+++ b/src/content/docs/en/guides/markdown-content.mdx
@@ -355,6 +355,12 @@ export default defineConfig({
       // Note: Shiki has countless langs built-in, including .astro!
       // https://shiki.style/languages
       langs: [],
+      // Add custom aliases for languages
+      // Map an alias to a Shiki language ID: https://shiki.style/languages#bundled-languages
+      // https://shiki.style/guide/load-lang#custom-language-aliases
+      langAlias: {
+        cjs: "javascript"
+      },
       // Enable word wrap to prevent horizontal scrolling
       wrap: true,
       // Add custom transformers: https://shiki.style/guide/transformers