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πŸŒπŸ“– A readable, automated, and optimized (3 kb) internationalization for JavaScript

Main Suite Release Workflow Testing Code Coverage PRs Welcome Join the community on Discord

Documentation Β· Quickstart Β· Example Β· Support Β· Contribute Β· License

Internationalization is the design and development of a product, application or document content that enables easy localization for target audiences that vary in culture, region, or language.

--- W3C Web Internationalization FAQ

Lingui is an easy yet powerful internationalization framework for global projects.

  • Clean and readable - Keep your code clean and readable, while the library uses battle-tested and powerful ICU MessageFormat under the hood.

  • Universal - Use it everywhere. @lingui/core provides the essential intl functionality which works in any JavaScript project while @lingui/react offers components to leverage React rendering.

  • Full rich-text support - Use React components inside localized messages without any limitation. Writing rich-text messages is as easy as writing JSX.

  • Powerful tooling - Manage the whole intl workflow using Lingui CLI. It extracts messages from source code, validates messages coming from translators and checks that all messages are translated before shipping to production.

  • Unopinionated - Integrate Lingui into your existing workflow. It supports message keys as well as auto-generated messages. Translations are stored either in JSON or standard PO files, which are supported in almost all translation tools.

  • Lightweight and optimized - Core library is only 1.5 kB gzipped, React components are an additional 1.3 kBs gzipped. That's less than Redux for a full-featured intl library.

  • Active community - Join us on Discord to discuss the latest development. At the moment, Lingui is the most active intl project on GitHub.

  • Compatible with react-intl - Low-level React API is very similar to react-intl and the message format is the same. It's easy to migrate an existing project.





If you're a react-intl user, check out a comparison of react-intl and Lingui.


Short example how i18n looks with JSX:

import { Trans } from "@lingui/macro"

function App() {
  return (
   <Trans id="" /* id is optional */>
     Read the <a href="">documentation</a>
     for more info.

Message from this component will be extracted in following format:

msgid ""
msgstr "Read the <0>documentation</0> for more info."

For more example see the Examples directory.


If you are having issues, please let us know.

  • Join us on Discord to chat with the community.
  • Ask questions on StackOverflow and mark it with Lingui tag.
  • If something doesn't work as documented, documentation is missing or if you just want to suggest a new feature, create an issue.


Contribution to open-source project is everything from spreading the word, writing documentation to implement features and fixing bugs.

  • Do you use Lingui in production site? Let us know!
  • Have you seen any interesting talk or article about i18n? Share it!
  • Have you found a bug or do you want to suggest a new feature? Create an issue!
  • Do you want to improve the docs and write some code? Read the contributors guide and send a PR!


This project exists thanks to all the people who contribute. [Contribute].


The project is licensed under the MIT license.