👽 🐛 Le simulateur est affiché en français sur mon-entreprise

source/Provider.js

@@ -8,10 +8,10 @@ import { Provider } from 'react-redux'
 import { Router } from 'react-router-dom'
 import reducers from 'Reducers/rootReducer'
 import { applyMiddleware, compose, createStore } from 'redux'
+import { enableBatching } from 'redux-batched-actions'
 import thunk from 'redux-thunk'
 import computeThemeColours from 'Ui/themeColours'
 import { getIframeOption, inIframe } from './utils'
-import { enableBatching } from 'redux-batched-actions'
 
 let initialStore = {
 	themeColours: computeThemeColours(getIframeOption('couleur'))
@@ -50,15 +50,16 @@ export default class Layout extends PureComponent {
 				...props.reduxMiddlewares
 			)
 		)
+		if (this.props.language) {
+			i18next.changeLanguage(this.props.language)
+			this.props.initialStore.lang = this.props.language
+		}
 		this.store = createStore(
 			enableBatching(reducers),
 			{ ...initialStore, ...this.props.initialStore },
 			storeEnhancer
 		)
 		this.props.onStoreCreated(this.store)
-		if (this.props.language) {
-			i18next.changeLanguage(this.props.language)
-		}
 	}
 	render() {
 		return (

source/reducers/rootReducer.js

@@ -17,6 +17,7 @@ import { combineReducers } from 'redux'
 import { reducer as formReducer } from 'redux-form'
 import computeThemeColours from 'Ui/themeColours'
 import { simulationTargetNames } from '../config.js'
+import i18n from '../i18n'
 import inFranceAppReducer from './inFranceAppReducer'
 import storageReducer from './storageReducer'
 import type { Action } from 'Types/ActionsTypes'
@@ -65,6 +66,15 @@ function activeTargetInput(state = null, { type, name }) {
 	}
 }
 
+function lang(state = i18n.language, { type, lang }) {
+	switch (type) {
+		case 'SWITCH_LANG':
+			return lang
+		default:
+			return state
+	}
+}
+
 type ConversationSteps = {|
 	+foldedSteps: Array<string>,
 	+unfoldedStep: ?string,
@@ -156,6 +166,7 @@ export default reduceReducers(
 		//  this is handled by redux-form, pas touche !
 		form: formReducer,
 		conversationSteps,
+		lang,
 		targetNames: defaultTo(simulationTargetNames),
 		themeColours,
 		explainedVariable,