eunomia-controller/source/components/LanguageProvider/index.js

import React from 'react';
import { connect } from 'react-redux';
import { createSelector } from 'reselect';
import { IntlProvider } from 'react-intl';
import { makeSelectLocale } from './selectors';

export class LanguageProvider extends React.PureComponent {
  render() {
    return (
      <IntlProvider locale={this.props.locale} key={this.props.locale} messages={this.props.messages[this.props.locale]}>
        {React.Children.only(this.props.children)}
      </IntlProvider>
    );
  }
}

LanguageProvider.propTypes = {
  locale: React.PropTypes.string,
  messages: React.PropTypes.object,
  children: React.PropTypes.element.isRequired
};

const mapStateToProps = createSelector (
  makeSelectLocale(),
  (locale) => ({ locale })
);

module.exports = connect(mapStateToProps)(LanguageProvider)