Lingo.dev

Open-source localization engineering tools. Connect to Lingo.dev localization engineering platform for consistent, quality translations.

Lingo API • Lingo React MCP • Lingo CLI • Lingo GitHub Action • Lingo Compiler for React (Early alpha)

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Quick Start

Tool	What it does	Quick Command
Lingo React MCP	AI-assisted i18n setup for React apps	Prompt: Set up i18n
Lingo CLI	Localize JSON, YAML, markdown, CSV, PO files	npx lingo.dev@latest run
Lingo GitHub Action	Continuous localization in GitHub Actions	uses: lingodotdev/lingo.dev@main
Lingo Compiler for React	Build-time React localization without i18n wrappers	withLingo() plugin

Localization engines

These tools connect to localization engines – stateful translation APIs you create on the Lingo.dev localization engineering platform. Each engine persists glossaries, brand voice, and per-locale instructions across every request, reducing terminology errors 16.6–44.6%. Or bring your own LLM.

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Lingo.dev MCP

Setting up i18n in React apps is error-prone – even AI coding assistants hallucinate non-existent APIs and break routing. Lingo.dev MCP gives AI assistants structured access to framework-specific i18n knowledge for Next.js, React Router, and TanStack Start. Works with Claude Code, Cursor, GitHub Copilot Agents, and Codex.

Read the docs →

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Lingo.dev CLI

Localize JSON, YAML, markdown, CSV, and PO files in one command. A lockfile tracks what's already localized – only new or changed content gets processed. Defaults to your localization engine on Lingo.dev, or bring your own LLM (OpenAI, Anthropic, Google, Mistral, OpenRouter, Ollama).

npx lingo.dev@latest init npx lingo.dev@latest run

Read the docs →

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Lingo.dev CI/CD

Continuous localization in your pipeline. Every push triggers localization – missing strings get filled before code reaches production. Supports GitHub Actions, GitLab CI/CD, and Bitbucket Pipelines.

uses: lingodotdev/lingo.dev@main with: api-key: ${{ secrets.LINGODOTDEV_API_KEY }}

Read the docs →

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Lingo.dev API

Call your localization engine directly from backend code. Synchronous and async localization with webhook delivery, failure isolation per locale, and real-time progress via WebSocket.

Read the docs →

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Lingo Compiler for React (Early alpha)

Build-time React localization without i18n wrappers. Write components with plain English text – the compiler detects translatable strings and generates localized variants at build time. No translation keys, no JSON files, no t() functions. Supports Next.js (App Router) and Vite + React.

Read the docs →

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Contributing

Contributions welcome. Please follow these guidelines:

1. Issues: Report bugs or request features
2. Pull Requests: Submit changes
   • Every PR requires a changeset: pnpm new (or pnpm new:empty for non-release changes)
   • Ensure tests pass before submitting
3. Development: This is a pnpm + turborepo monorepo
   • Install dependencies: pnpm install
   • Run tests: pnpm test
   • Build: pnpm build

Support: Discord community

Star History

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Localized Documentation

Available translations:

English • 中文 • 日本語 • 한국어 • Español • Français • Русский • Українська • Deutsch • Italiano • العربية • עברית • हिन्दी • Português (Brasil) • বাংলা • فارسی • Polski • Türkçe • اردو • भोजपुरी • অসমীয়া • ગુજરાતી • मराठी • ଓଡ଼ିଆ • ਪੰਜਾਬੀ • සිංහල • தமிழ் • తెలుగు

Adding a new language:

1. Add locale code to i18n.json using BCP-47 format
2. Submit a pull request