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.
Lingui is an easy yet powerful internationalization (i18n) 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, including React Server Components (RSC) support.
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 your intl workflow with the Lingui CLI, Vite Plugin, and ESLint Plugin. The CLI extracts, compiles and validates messages, while the Vite plugin compiles catalogs on the fly, and the ESLint plugin helps catch common usage errors.
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 less than 2 kB gzipped, React components are additional 1.4 kB gzipped.
Active community - Join the growing community of developers who are using Lingui to build global products.
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.
Short example how i18n looks with JSX:
import { Trans } from "@lingui/react/macro" function App() { return ( <Trans id="msg.docs" // Optional message id comment="Docs link on the website" // Comment for translators, optional > Read the <a href="https://lingui.dev">documentation</a> for more info. </Trans> ) }
Message from this component will be extracted in following format:
msgid "msg.docs" 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.
linguijs
tag.For developers working with AI and language models, we provide specialized documentation files following the llms.txt specification:
These files provide LLM-friendly content in a standardized format, helping language models understand and work with Lingui's documentation at inference time. The format is designed to be both human and LLM readable, with structured information that can be processed programmatically.
Contribution to open-source project is everything from spreading the word, writing documentation to implement features and fixing bugs.
This project exists thanks to all the people who contribute. [Contribute].
The project is licensed under the MIT license.
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