La langue par défaut est définie dans les reducers

source/actions.js

@@ -40,4 +40,3 @@ export function changeThemeColour(colour) {
 }
 
 export const EXPLAIN_VARIABLE = 'EXPLAIN_VARIABLE'
-export const CHANGE_LANG = 'CHANGE_LANG'

source/components/pages/Header.js

@@ -6,7 +6,6 @@ import { Link } from 'react-router-dom'
 import screenfull from 'screenfull'
 import { connect } from 'react-redux'
 import { withRouter } from 'react-router'
-import { CHANGE_LANG } from '../../actions'
 
 @withRouter
 @connect(state => ({
@@ -93,7 +92,7 @@ let Links = ({ toggle }) => (
 @withRouter
 @translate()
 @connect(null, dispatch => ({
-	changeLanguage: lang => dispatch({ type: CHANGE_LANG, lang })
+	changeLanguage: lang => dispatch({ type: 'SWITCH_LANG', lang })
 }))
 export class LangSwitcher extends Component {
 	static contextTypes = {

source/entry.js

@@ -1,7 +1,6 @@
 /* global process: false */
 
 import ReactPiwik from 'Components/Tracker'
-import { rules, rulesFr } from 'Engine/rules'
 import React from 'react'
 import { render } from 'react-dom'
 import { AppContainer } from 'react-hot-loader'
@@ -9,7 +8,6 @@ import { Provider } from 'react-redux'
 import { applyMiddleware, compose, createStore } from 'redux'
 import computeThemeColours from './components/themeColours'
 import Layout from './containers/Layout'
-import lang from './i18n'
 import trackDomainActions from './middlewares/trackDomainActions'
 import reducers from './reducers/reducers'
 import {
@@ -19,7 +17,7 @@ import {
 import { getIframeOption, getUrl } from './utils'
 
 let tracker = {
-	push: console.log,
+	push: console.log, // eslint-disable-line no-console
 	connectToHistory: history => history
 }
 if (process.env.NODE_ENV === 'production') {
@@ -49,9 +47,6 @@ let initialStore = {
 const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose
 let enhancer = composeEnhancers(applyMiddleware(trackDomainActions(tracker)))
 
-// let initialRules = lang == 'en' ? rules : rulesFr
-//TODO reintroduce initial language
-//
 let store = createStore(reducers, initialStore, enhancer)
 let anchor = document.querySelector('#js')
 persistSimulation(store)

source/i18n.js

@@ -23,7 +23,7 @@ i18next.init(
 		}
 	},
 	(err, t) => {
-		console.log('Error from i18n load', err, t)
+		console.log('Error from i18n load', err, t) //eslint-disable-line no-console
 	}
 )
 

source/reducers/reducers.js

@@ -5,6 +5,7 @@ import reduceReducers from 'reduce-reducers'
 import { combineReducers } from 'redux'
 import { reducer as formReducer } from 'redux-form'
 import storageReducer from '../storage/reducer'
+import defaultLang from '../i18n'
 
 function themeColours(state = computeThemeColours(), { type, colour }) {
 	if (type == 'CHANGE_THEME_COLOUR') return computeThemeColours(colour)
@@ -50,7 +51,7 @@ function activeTargetInput(state = null, { type, name }) {
 	}
 }
 
-function lang(state = null, { type, lang }) {
+function lang(state = defaultLang, { type, lang }) {
 	switch (type) {
 		case 'SWITCH_LANG':
 			return lang