1. Identify the target locale code.
2. Copy the Turkish (`tr`) folder structure as a base.
3. Register the new locale in `src/components/book/elements/locales/index.ts`.
4. Translate MDX content files in `src/content/book/{locale}/`.
5. Translate JSON keys in `messages/{locale}.json`.
6. Translate the locale data file at `src/components/book/elements/locales/{locale}.ts`.
7. Verify the translation using the check script and dev server.