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react-native-i18n

Integrates I18n.js with React Native. Uses the user preferred locale as default.

Installation

Using npm

$ npm install react-native-i18n --save

Using yarn

$ yarn add react-native-i18n

Automatic setup

After installing the npm package you need to link the native modules.

If you're using React-Native < 0.29, install rnpm with the command npm install -g rnpm and then link the library with the command rnpm link. If you're using React-Native >= 0.29 just link the library with the command react-native link.

If you're having any issue you can also try to install the library manually as follows.

Manual setup

iOS

Add RNI18n.xcodeproj to Libraries and add libRNI18n.a to Link Binary With Libraries under Build Phases.
More info and screenshots about how to do this is available in the React Native documentation.

You also need to add the localizations you intend to support to your iOS project. To do that open your Xcode project:

$ open <your-project>.xcodeproj

And add the localizations you will support as shown here:

Android

Add react-native-i18n to your ./android/settings.gradle file as follows:

include ':app', ':react-native-i18n'
project(':react-native-i18n').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-i18n/android')

Include it as dependency in ./android/app/build.gradle file:

dependencies {
    ...
    compile project(':react-native-i18n')
}

Finally, you need to add the package to your MainApplication (./android/app/src/main/java/your/bundle/MainApplication.java):

import com.AlexanderZaytsev.RNI18n.RNI18nPackage; // <-- Add to ReactNativeI18n to the imports

...

@Override
protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        ...
        new RNI18nPackage(), // <-- Add it to the packages list
        ...
    );
}

...

After that, you will need to recompile your project with react-native run-android.

Note: You'll need to install Android build tools 25.0.2

Usage

import I18n from 'react-native-i18n'

class Demo extends React.Component {
  render () {
    return (
      <Text>{I18n.t('greeting')}</Text>
    )
  }
}

// Enable fallbacks if you want `en-US` and `en-GB` to fallback to `en`
I18n.fallbacks = true

I18n.translations = {
  en: {
    greeting: 'Hi!'
  },
  fr: {
    greeting: 'Bonjour!'
  }
}

This will render Hi! for devices with the English locale, and Bonjour! for devices with the French locale.

Usage with multiple location files

// app/i18n/locales/en.js

export default {  
  greeting: 'Hi!'
};

// app/i18n/locales/fr.js

export default {  
  greeting: 'Bonjour!'
};

// app/i18n/i18n.js

import I18n from 'react-native-i18n';
import en from './locales/en';
import fr from './locales/fr';  

I18n.fallbacks = true;

I18n.translations = {
  en,
  fr
};

export default I18n; 

// usage in component

import I18n from 'app/i18n/i18n';

class Demo extends React.Component {
  render () {
    return (
      <Text>{I18n.t('greeting')}</Text>
    )
  }
}

Fallbacks

When fallbacks are enabled (which is generally recommended), i18n.js will try to look up translations in the following order (for a device with en_US locale):

en-US
en

Note: iOS 8 locales use underscored (en_US) but i18n.js locales are dasherized (en-US). This conversion is done automatically for you.

I18n.fallbacks = true

I18n.translations = {
  'en': {
    greeting: 'Hi!'
  },
  'en-GB': {
    greeting: 'Hi from the UK!'
  }
}

For a device with a en_GB locale this will return Hi from the UK!', for a device with a en_US locale it will return Hi!.

Device's locale

You can get the user preferred locales with the RNI18n native module:

import { getLanguages } from 'react-native-i18n'

getLanguages().then(languages => {
  console.log(languages)
})

Returns ['en-US', 'en'].

I18n.js documentation

For more info about I18n.js methods (localize, pluralize, etc) and settings see its documentation.

Licence

MIT

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