react-native-i18n/README.md

# react-native-i18n Integrates [I18n.js](https://github.com/fnando/i18n-js) with React Native. Uses the device's locale as default.

Installation

If you're on react-native >= 0.40: $ npm install react-native-i18n --save
If you're on react-native < 0.40: $ npm install react-native-i18n@0.1.1 --save

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. You can do so using rnpm.

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

[WARNING] There is currently an issue with the react-native link / rnpm install method. Prefers the manual install until it is solved.

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 the 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.i18n.reactnativei18n.ReactNativeI18n;  // <-- Add to ReactNativeI18n to the imports

...

@Override
protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        ...
        new ReactNativeI18n(), // <-- Add it to the packages list
        ...
    );
}

...

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

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 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 device's locale with the RNI18n native module:

import ReactNativeI18n from 'react-native-i18n'
const deviceLocale = ReactNativeI18n.locale

Returns en-US.

I18n.js documentation

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

Licence

MIT