i18next documentation
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Introduction
Overview
Getting started
Comparison to others
API
Configuration Options
Supported Frameworks
Plugins and Utils
For Enterprises
First setup help
Translation Function
Essentials
Interpolation
Formatting
Plurals
Nesting
Context
Objects and Arrays
Principles
Translation Resolution
Namespaces
Fallback
Plugins
How to
Add or Load Translations
Extracting translations
Caching
Backend Fallback
FAQ
Misc
JSON Format
Creating own Plugins
Migration Guide
The history of i18next
🌐 localization as a service
🔎 Find your translator
🎓 i18next crash course
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Plugins and Utils

i18n formats

While the i18next format (JSON based) is the preferred solution and widely supported in translation management tools like locize.com, you might prefer another exciting format, like:
name
format
description
fluent
i18nFormat plugin to use mozilla fluent format with i18next
ICU
i18nFormat plugin to use ICU format with i18next based on yahoo/intl-messageformat​
polyglot
i18nFormat plugin to use airbnb/polyglot.js format with i18next

extraction tools

name
description
Scan your code, extract translation keys/values, and merge them into i18n resource files.
A simple command line and gulp plugin that lets you parse your code and extract the translations keys in it.
A babel plugin that can extract keys in JSONv3 format.
Nicely shows an overview of your translations in a UI. Check which keys are not yet translated.

utils

util
type
description
converter
Converts gettext .mo or .po to 18next json format and vice versa.
converter
Convert CSV files to JSON & YAML for i18next.js
converter
Convert between CSV files and JSON format for i18next
converter
Convert ResX-files to json resources compatible with i18next
extractor
Intellij IDEA Plugin for i18next resource generation
extractor
Extracts i18n keys and values from source files.
bundler
bundle language resource files for i18next
bundler
Convert gettext PO files into i18next JSON format during webpack builds
bundler
Load gettext PO files as i18next format directly in webpack
bundler
webpack loader that can translate your code and generate bundle per each language
bundler
This webpack loader generates the resources structure necessary for i18next. The structure is webpacked with the client bundle at build time, thus avoiding loading any language resources via extra HTTP requests.
bundler
This loader generates the resStore config needed for i18next to avoid loading language resources via extra HTTP requests. It generates this config given a directory.
bundler
Yet another i18next webpack plugin. This plugin collects keys from webpack parsing phase, saves missing translations into specified path, copies translation files.
bundler/converter
Import .po files with rollup
util
analyse statically your code to find calls to i18next and validates them for all your supported languages
util
Keep i18next JSON resource files in sync with source language file
util
Syncs i18next locale resource files against a primary language. Supports namespaces, plural forms and key sorting.
util
Make sure that all text shown are translated
IDE integration
Navigation, code completion, highlighting
bundler / DX
HMR webpack plugin that allows to reload translation resources on client & server
util / DX
Nicely shows an overview of your translations in a UI. Check which keys are not yet translated.
converter
Convert old i18next translation resources to the new i18next v4 json format. Via CLI or programmatically.
online-converter
Convert old i18next translation resources to the new i18next v4 json format directly in your browser.
​
Intellij idea i18next support plugin.
bundler / DX
Webpack loader to fetch locale files with ES6 modules, supporting autocomplete, type checking, HMR and content based hashing

services

Services that are known to fully support the i18next format (plural handling, ...) and sponsoring or contributing to the development of i18next.
name
description
​locize​
localization as a service. Solves your localization process using i18next.

backend extenders

backend
description
combine multiple of the existing backends for fallback and caching scenarios
enable another backend's multiload behaviour of loading multiple lng-ns combinations with one request. This behaviour was removed from i18next >=v11.0.0 and could be enabled again by using this adapter

backends

backend
description
This is a i18next cache layer to be used in the browser. It will load and cache resources from localStorage and can be used in combination with the chained backend.
This is a i18next cache layer to be used in react native. It will load and cache resources from AsyncStorage and can be used in combination with the chained backend.
backend layer for i18next used in Node.js and for Deno to load translations from the filesystem.
It can also be used as cache layer in combination with the chained backend, i.e. a chained backend together with the http backendor with the locize backend.
backend layer for i18next using in node.js, in the browser and for deno (will use xhr or fetch)
backend layer for i18next using browsers xhr deprecated
backend layer for i18next using browsers fetch
backend to load fluent syntax .ftl files via xhr
fetch missing keys on demand
backend layer for i18next used in Node.js & Deno to load translations from the MongoDB.
backend layer for i18next used in Node.js & Deno to load translations from Google's Firestore DB.
node.js backend layer for i18next using fs module to load resources from filesystem
node.js backend for i18next using fs module to load resources securely in an electron app from filesystem
node.js backend layer for i18next using request module to load resources from another server
i18next node.js backend layer for i18next using couchbase
i18next node.js backend layer for Zanata​
i18next Backend Using Firebase
i18next backend for smart-bucket
Use webpack code splitting to load files as a javascript bundle
i18next backend for Transifex Native

language detector

language detector
description
Language detector that works universally (browser + server) - Meant to be used with a universal framework, such as Next.js
​browser​
language detector used in browser environment for i18next
​http​
language detector for "any" http backend, also for Deno
language detector for express.js (nodejs).
A i18next language detecting plugin for Koa framework.
language detector for React Native.
language detector for React Native that saves the user's choice in Async Storage, used for persistence.
​electron​
language detector for electron apps.
​CLI​
language detector for CLI.

post processors

post processor
description
sprintf post processor for i18next.
interval based plurals like. "One Item", "A few items", "A lot of items"
embed React elements inside your i18next translation strings
i18next post-processor for processing korean postposition
i18next post-processor for pseudolocalization of strings
i18next postProcessor plugin for Node.js and in the browser that replaces all words with emojis.

loggers

Only the integrated console logger is available for now.

Create your own plugin

Want to create your own plugins? Learn more here.
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For Enterprises
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i18n formats
extraction tools
utils
services
backend extenders
backends
language detector
post processors
loggers
Create your own plugin