Next Intl Add Language — Agent Skill by GitHub

From the author

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

— the description by tgrall

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a structured workflow for developers looking to expand the internationalization support of their Next.js projects. It outlines the necessary steps to integrate a new language, ensuring that translation files, routing configurations, and UI components are updated consistently to maintain a functional multilingual experience.

What it does

Defines the directory structure for translation files.
Identifies key configuration files for routing and middleware updates.
Provides a checklist for updating language toggle components.
Ensures synchronization between translation JSON files and application routing.

When to use it

When you need to add support for a new locale in an existing Next.js project.
When scaling an application to support multiple languages using next-intl.
When updating the language switcher component to include new language options.

Advantages

Provides a clear, step-by-step process for internationalization updates.
Reduces the risk of misconfiguration in routing and middleware.
Ensures all required files are addressed during the localization process.

Usage examples

“How do I add Spanish to my Next.js project using next-intl?”: The agent will guide you through creating the Spanish translation file, updating the routing and middleware configurations, and adding the language to your toggle component.

Install

Download the skill as a ZIP:
https://autogineer.com/agent-skills/github/next-intl-add-language/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip next-intl-add-language.zip -d .agents/skills

Documentation by tgrall

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.

Files

ATTRIBUTION.mdAdded by AutoGineer1.1 KiB
LICENSELicence file added by AutoGineer1.0 KiB
SKILL.md750 B

LICENSE

MIT License

Copyright GitHub, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Requirements and compatibility

Written for: GitHub Copilot

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

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