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next-intl-add-language

Add a language to a Next.js application using next-intl. Translate every entry in the English message file, then update routing, middleware, and the language selector so the new language is included across the specified application files.

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Add new language to a Next.js + next-intl application

See how to install

Good for

  • Adding a language to a Next.js application
  • Translating every entry in an English message file
  • Updating routing and middleware for a new language
  • Adding a language to the UI language selector

Files included (1)

  • SKILL.md750 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

This is a guide to add a new language to a Next.js project using next-intl for internationalization,

  • For i18n, the application uses next-intl.
  • All translations are in the directory ./messages.
  • The UI component is src/components/language-toggle.tsx.
  • Routing and middleware configuration are handled in:
    • src/i18n/routing.ts
    • src/middleware.ts

When adding a new language:

  • Translate all the content of en.json to the new language. The goal is to have all the JSON entries in the new language for a complete translation.
  • Add the path in routing.ts and middleware.ts.
  • Add the language to language-toggle.tsx.

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