next-intl-add-language

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

github By github schedule Updated 2/24/2026

name: next-intl-add-language description: 'Add new language to a Next.js + next-intl application'

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.
Install via CLI
npx skills add https://github.com/github/awesome-copilot --skill next-intl-add-language
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