diff --git a/source/actions.js b/source/actions.js
index 955de7b21..45ef661bc 100644
--- a/source/actions.js
+++ b/source/actions.js
@@ -34,3 +34,4 @@ export function changeThemeColour(colour) {
 }
 
 export const EXPLAIN_VARIABLE = 'EXPLAIN_VARIABLE'
+export const CHANGE_LANG = 'CHANGE_LANG'
diff --git a/source/components/Results.js b/source/components/Results.js
index 3cc49ba07..9a6d781fa 100644
--- a/source/components/Results.js
+++ b/source/components/Results.js
@@ -8,10 +8,12 @@ import { withRouter } from 'react-router'
 import './Results.css'
 import RuleValueVignette from './rule/RuleValueVignette'
 import ProgressTip from 'Components/ProgressTip'
+import { findRuleByDottedName } from 'Engine/rules.js'
 
 @withRouter
 @connect(state => ({
 	analysis: state.analysis,
+	flatRules: state.flatRules,
 	targetName: state.targetName,
 	conversationStarted: !isEmpty(state.form),
 	conversationFirstAnswer: path(['form', 'conversation', 'values'])(state),
@@ -22,7 +24,11 @@ import ProgressTip from 'Components/ProgressTip'
 @translate()
 export default class Results extends Component {
 	render() {
-		let { analysis, conversationStarted, done, themeColours } = this.props
+		let { flatRules, analysis, conversationStarted, done, themeColours } = this.props
+			let withFlatRule = rule => ({
+				...rule,
+				flatRule: findRuleByDottedName(flatRules, rule.dottedName)
+			})
 
 		if (!analysis) return null
 
@@ -44,7 +50,7 @@ export default class Results extends Component {
 							{targets.map(rule => (
 								<li key={rule.nom} style={textStyle}>
 									<RuleValueVignette
-										{...rule}
+										{...withFlatRule(rule)}
 										conversationStarted={conversationStarted}
 									/>
 								</li>
diff --git a/source/components/RulePage.js b/source/components/RulePage.js
index 49fa274b7..0e2ec48d9 100644
--- a/source/components/RulePage.js
+++ b/source/components/RulePage.js
@@ -18,7 +18,7 @@ import { Namespace } from './rule/Rule'
 
 @connect(state => ({
 	situationGate: state.situationGate,
-	parsedRules: state.parsedRules,
+	flatRules: state.flatRules,
 	analysis: state.analysis
 }))
 export default class RulePage extends Component {
@@ -35,23 +35,23 @@ export default class RulePage extends Component {
 		}
 	}
 	setRule(name) {
-		let { parsedRules, situationGate } = this.props,
+		let { flatRules, situationGate } = this.props,
 			decodedRuleName = decodeRuleName(name)
 		if (decodedRuleName.includes(' . ')) {
-			let rule = findRuleByDottedName(parsedRules, decodedRuleName)
+			let rule = findRuleByDottedName(flatRules, decodedRuleName)
 			this.rule =
 				rule &&
-				head(analyse(parsedRules, rule.dottedName)(situationGate).targets)
+				head(analyse(flatRules, rule.dottedName)(situationGate).targets)
 			this.multipleMatchingRules = false
 			return
 		}
 
 		let ruleName = nameLeaf(decodeRuleName(name)),
-			rules = findRulesByName(parsedRules, ruleName)
+			rules = findRulesByName(flatRules, ruleName)
 		if (!rules.length) return null
 		if (rules.length > 1) this.multipleMatchingRules = rules
 		this.rule = head(
-			analyse(parsedRules, head(rules).dottedName)(situationGate).targets
+			analyse(flatRules, head(rules).dottedName)(situationGate).targets
 		)
 	}
 	render() {
diff --git a/source/components/Simulateur.js b/source/components/Simulateur.js
index baca4818b..fc72416bd 100644
--- a/source/components/Simulateur.js
+++ b/source/components/Simulateur.js
@@ -7,7 +7,6 @@ import { withRouter, Redirect } from 'react-router-dom'
 import classNames from 'classnames'
 import { START_CONVERSATION } from '../actions'
 import {
-	rules,
 	findRuleByName,
 	findRule,
 	findRuleByDottedName,
@@ -34,7 +33,8 @@ import Explanation from 'Components/Explanation'
 		done: state.done,
 		nextSteps: state.nextSteps,
 		inputInversions: formValueSelector('conversation')(state, 'inversions'),
-		analysis: state.analysis
+		analysis: state.analysis,
+		flatRules: state.flatRules
 	}),
 	dispatch => ({
 		startConversation: (targetNames, fromScratch = false) =>
@@ -51,6 +51,7 @@ export default class extends Component {
 		let {
 				match: { params: { targets: encodedTargets } },
 				targetNames: pastTargetNames,
+				flatRules,
 				resetFormField
 			} = this.props,
 			targetNames = encodedTargets.split('+').map(decodeRuleName)
@@ -58,7 +59,7 @@ export default class extends Component {
 		this.targetNames = targetNames
 
 		this.targetRules = reject(isNil)(
-			targetNames.map(name => findRule(rules, name))
+			targetNames.map(name => findRule(flatRules, name))
 		)
 
 		this.targetRules.map(({ dottedName }) => resetFormField(dottedName))
@@ -74,6 +75,7 @@ export default class extends Component {
 		if (this.targetRules.length == 0) return <Redirect to="/404" />
 
 		let {
+				flatRules,
 				foldedSteps,
 				currentQuestion,
 				situationGate,
@@ -105,13 +107,13 @@ export default class extends Component {
 						reinitalise,
 						currentQuestion:
 							currentQuestion &&
-							this.buildStep({ unfolded: true })(
+							this.buildStep({ unfolded: true, flatRules })(
 								situationGate,
 								this.targetNames,
 								inputInversions
 							)(currentQuestion),
 						foldedSteps: map(
-							this.buildStep({ unfolded: false })(
+							this.buildStep({ unfolded: false, flatRules })(
 								situationGate,
 								this.targetNames,
 								inputInversions
@@ -133,18 +135,18 @@ export default class extends Component {
 		)
 	}
 
-	buildStep = ({ unfolded }) => (
+	buildStep = ({ unfolded, flatRules }) => (
 		situationGate,
 		targetNames,
 		inputInversions
 	) => question => {
-		let step = makeQuestion(rules, targetNames)(question)
+		let step = makeQuestion(flatRules, targetNames)(question)
 
 		let fieldName =
 				(inputInversions &&
 					path(step.dottedName.split('.'), inputInversions)) ||
 				step.dottedName,
-			fieldTitle = findRuleByDottedName(rules, fieldName).title
+			fieldTitle = findRuleByDottedName(flatRules, fieldName).title
 
 		return (
 			<step.component
diff --git a/source/components/TargetSelection.js b/source/components/TargetSelection.js
index b908ce932..49ff16467 100644
--- a/source/components/TargetSelection.js
+++ b/source/components/TargetSelection.js
@@ -9,7 +9,7 @@ import BlueButton from './BlueButton'
 export let salaries = ['salaire net', 'salaire de base', 'salaire total']
 
 @connect(state => ({
-	parsedRules: state.parsedRules,
+	flatRules: state.flatRules,
 }))
 @translate()
 export default class TargetSelection extends Component {
@@ -37,9 +37,9 @@ export default class TargetSelection extends Component {
 	}
 
 	renderOutputList() {
-		let { parsedRules } = this.props,
+		let { flatRules } = this.props,
 			popularTargets = [...salaries, 'aides employeur différées'].map(
-				curry(findRuleByName)(parsedRules)
+				curry(findRuleByName)(flatRules)
 			),
 			{ targets } = this.state,
 			textColourOnWhite = this.props.themeColours.textColourOnWhite,
diff --git a/source/components/pages/Header.js b/source/components/pages/Header.js
index 0dfcf855b..dd076fb20 100644
--- a/source/components/pages/Header.js
+++ b/source/components/pages/Header.js
@@ -6,6 +6,7 @@ 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 => ({
@@ -102,6 +103,12 @@ let Links = ({ toggle }) => (
 
 @withRouter
 @translate()
+@connect(
+	state => {},
+	dispatch => ({
+		changeLanguage: (lang) => dispatch({ type: CHANGE_LANG, lang })
+	})
+)
 export class Footer extends Component {
 	static contextTypes = {
       i18n: PropTypes.object.isRequired
@@ -109,6 +116,7 @@ export class Footer extends Component {
 	render() {
 		let { i18n } = this.context
 		let changeLanguage = lng => {
+				this.props.changeLanguage(lng)
 				i18n.changeLanguage(lng)
 			}
 		let appMode = ['/simu', '/regle'].find(t =>
diff --git a/source/components/rule/Rule.js b/source/components/rule/Rule.js
index 88c13e249..6314c4b74 100644
--- a/source/components/rule/Rule.js
+++ b/source/components/rule/Rule.js
@@ -10,7 +10,7 @@ import Helmet from 'react-helmet'
 import { createMarkdownDiv } from 'Engine/marked'
 import Destinataire from './Destinataire'
 import { Link } from 'react-router-dom'
-import { findRuleByNamespace, encodeRuleName } from 'Engine/rules'
+import { findRuleByNamespace, encodeRuleName, findRuleByDottedName } from 'Engine/rules'
 import withColours from '../withColours'
 
 import SearchButton from 'Components/SearchButton'
@@ -18,14 +18,16 @@ import SearchButton from 'Components/SearchButton'
 @connect(state => ({
 	form: state.form,
 	rules: state.parsedRules,
+	flatRules: state.flatRules,
 	currentExample: state.currentExample
 }))
 export default class Rule extends Component {
 	render() {
-		let { form, rule, currentExample, rules } = this.props,
+		let { form, rule, currentExample, rules, flatRules } = this.props,
+			flatRule = findRuleByDottedName(flatRules, rule.dottedName),
 			conversationStarted = !isEmpty(form)
 
-		let { type, name, title, description, question, ns } = rule,
+		let { type, name, title, description, question, ns } = flatRule,
 			namespaceRules = findRuleByNamespace(rules, rule.dottedName)
 
 		return (
@@ -53,21 +55,21 @@ export default class Rule extends Component {
 						rule={rule}
 						showValues={conversationStarted || currentExample}
 					/>
-					{rule.note && (
+					{flatRule.note && (
 						<section id="notes">
 							<h3>Note: </h3>
-							{createMarkdownDiv(rule.note)}
+							{createMarkdownDiv(flatRule.note)}
 						</section>
 					)}
 					<Examples
 						currentExample={currentExample}
 						situationExists={conversationStarted}
-						rule={rule}
+						rule={flatRule}
 					/>
 					{!isEmpty(namespaceRules) && (
-						<NamespaceRulesList {...{ rule, namespaceRules }} />
+						<NamespaceRulesList {...{ flatRule, namespaceRules }} />
 					)}
-					{this.renderReferences(rule)}
+					{this.renderReferences(flatRule)}
 				</section>
 				<ReportError />
 			</div>
diff --git a/source/components/rule/RuleValueVignette.js b/source/components/rule/RuleValueVignette.js
index cc0b96702..b38a5442b 100644
--- a/source/components/rule/RuleValueVignette.js
+++ b/source/components/rule/RuleValueVignette.js
@@ -11,11 +11,12 @@ import ReactCSSTransitionGroup from 'react-addons-css-transition-group'
 export default ({
 	name,
 	type,
-	title,
 	conversationStarted,
+	flatRule,
 	nodeValue: ruleValue
 }) =>
 	do {
+		debugger;
 		let unsatisfied = ruleValue == null,
 			irrelevant = ruleValue == 0,
 			number = typeof ruleValue == 'number' && ruleValue > 0
@@ -29,7 +30,7 @@ export default ({
 		>
 			<Link to={'/règle/' + encodeRuleName(name)}>
 				<div className="rule-box">
-					<span className="rule-name">{title}</span>
+					<span className="rule-name">{flatRule.title}</span>
 					<RuleValue
 						{...{ unsatisfied, irrelevant, conversationStarted, ruleValue }}
 					/>
diff --git a/source/reducers.js b/source/reducers.js
index aeae1d1b8..8ec8e8f90 100644
--- a/source/reducers.js
+++ b/source/reducers.js
@@ -28,7 +28,8 @@ import {
 	STEP_ACTION,
 	START_CONVERSATION,
 	EXPLAIN_VARIABLE,
-	CHANGE_THEME_COLOUR
+	CHANGE_THEME_COLOUR,
+	CHANGE_LANG
 } from './actions'
 
 import { analyseMany, parseAll } from 'Engine/traverse'
@@ -66,6 +67,16 @@ export let reduceSteps = (tracker, flatRules, answerSource) => (
 		state.parsedRules = parseAll(flatRules)
 	}
 
+	// TODO
+	if (action.type == CHANGE_LANG) {
+		if (action.lang == 'fr') { flatRules = rulesFr }
+		else flatRules = rules
+		return {
+			...state,
+			flatRules
+		}
+	}
+
 	if (
 		![START_CONVERSATION, STEP_ACTION, 'USER_INPUT_UPDATE'].includes(
 			action.type
@@ -222,5 +233,5 @@ export default reduceReducers(
 		currentExample
 	}),
 	// cross-cutting concerns because here `state` is the whole state tree
-	reduceSteps(ReactPiwik, rules, formatInputs(rules, formValueSelector))
+	reduceSteps(ReactPiwik, rules, formatInputs(rulesFr, formValueSelector))
 )