React
6.3M weekly downloads

React Localization with react-i18next

The most popular React i18n library. 6.3M weekly downloads. Learn setup, lazy loading, namespaces, and connect to IntlPull for production workflows.

Prerequisites

  • React 18+ application
  • Node.js 18+
  • npm or pnpm package manager

Common Challenges

Problems developers face when localizing React apps—and how IntlPull helps.

Initial Setup Complexity

i18next has many configuration options. Choosing the right setup for your use case takes research.

File Management at Scale

Managing JSON translation files across teams. Merge conflicts. Missing keys. Version drift.

Translation Workflow

Developers extract strings. Translators work in spreadsheets. Import/export cycles. Manual coordination.

react-i18next Features

Why react-i18next is a great choice for React localization.

Namespace Support

Split translations by feature or page. Load only what you need. Reduce initial bundle size.

vs single translation file

Lazy Loading

Load translations on-demand. Perfect for large apps with many languages. Automatic chunk splitting.

vs loading all upfront

Interpolation & Plurals

ICU MessageFormat support. Handle complex pluralization, gender, and variables.

vs basic string replacement

SSR Compatible

Works with Next.js, Remix, and custom SSR setups. Hydration-safe translation hooks.

vs client-only solutions

Context API Integration

Uses React Context for language state. No prop drilling. Automatic re-renders on language change.

vs manual state management

Plugin Ecosystem

Detection plugins, backend loaders, caching. Extend functionality without forking.

vs building from scratch

Quick Setup

Get react-i18next running in your React project.

1

Install Dependencies

Add react-i18next and i18next to your project.

npm install react-i18next i18next i18next-http-backend i18next-browser-languagedetector
2

Create i18n Configuration

Set up the i18n instance with your preferred options.

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import Backend from 'i18next-http-backend';
import LanguageDetector from 'i18next-browser-languagedetector';

i18n
  .use(Backend)
  .use(LanguageDetector)
  .use(initReactI18next)
  .init({
    fallbackLng: 'en',
    debug: process.env.NODE_ENV === 'development',
    interpolation: {
      escapeValue: false,
    },
    backend: {
      loadPath: '/locales/{{lng}}/{{ns}}.json',
    },
  });

export default i18n;
3

Wrap Your App

Import and initialize i18n in your app entry point.

import React from 'react';
import ReactDOM from 'react-dom/client';
import './i18n'; // Import i18n configuration
import App from './App';

ReactDOM.createRoot(document.getElementById('root')!).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);
4

Use Translations

Use the useTranslation hook in your components.

import { useTranslation } from 'react-i18next';

function Welcome() {
  const { t } = useTranslation();
  
  return (
    <div>
      <h1>{t('welcome.title')}</h1>
      <p>{t('welcome.description')}</p>
    </div>
  );
}

IntlPull Integration

Connect IntlPull to manage translations professionally.

1

Install IntlPull CLI

Add the CLI to manage translations.

npm install -D @intlpull/cli
2

Initialize Project

Connect to your IntlPull project.

npx intlpull init
3

Pull Translations

Download translations to your locale files.

npx intlpull pull --format json --output ./public/locales
4

Push New Strings

Upload new translation keys from your codebase.

npx intlpull push --source ./public/locales/en

Frequently Asked Questions

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    React i18next Localization Guide | IntlPull | IntlPull