diff --git a/source/actions/actions.ts b/source/actions/actions.ts
index 8661b1458..35ace4be8 100644
--- a/source/actions/actions.ts
+++ b/source/actions/actions.ts
@@ -17,7 +17,7 @@ export type Action =
 	| HideControlAction
 	| LoadPreviousSimulationAction
 	| SetSituationBranchAction
-	| UpdateDefaultUnit
+	| UpdateDefaultUnitAction
 	| SetActiveTargetAction
 
 export type ThunkResult<R> = ThunkAction<
@@ -64,7 +64,7 @@ type SetSituationBranchAction = ReturnType<typeof setSituationBranch>
 type SetActiveTargetAction = ReturnType<typeof setActiveTarget>
 type HideControlAction = ReturnType<typeof hideControl>
 type ExplainVariableAction = ReturnType<typeof explainVariable>
-type UpdateDefaultUnit = ReturnType<typeof updateUnit>
+type UpdateDefaultUnitAction = ReturnType<typeof updateUnit>
 
 export const resetSimulation = () =>
 	({
diff --git a/source/engine/index.ts b/source/engine/index.ts
index c368e7c46..e1e350159 100644
--- a/source/engine/index.ts
+++ b/source/engine/index.ts
@@ -27,6 +27,7 @@ type Cache = {
 	}
 }
 
+export { default as translateRules } from './translateRules'
 export { parseRules }
 export default class Engine {
 	parsedRules: Record<DottedName, Rule>
diff --git a/source/engine/ruleUtils.js b/source/engine/ruleUtils.js
index 6b3c1fc47..eda9b54ce 100644
--- a/source/engine/ruleUtils.js
+++ b/source/engine/ruleUtils.js
@@ -1,5 +1,4 @@
 import {
-	assoc,
 	dropLast,
 	filter,
 	isNil,
@@ -9,7 +8,6 @@ import {
 	pipe,
 	propEq,
 	range,
-	reduce,
 	reject,
 	split,
 	take
@@ -72,70 +70,6 @@ export function collectDefaults(parsedRules) {
  Autres 
  */
 
-/* Traduction */
-const translateContrôle = (prop, rule, translation, lang) =>
-	assoc(
-		'contrôles',
-		rule.contrôles.map((control, i) => ({
-			...control,
-			message: translation[`${prop}.${i}.${lang}`]?.replace(
-				/^\[automatic\] /,
-				''
-			)
-		})),
-		rule
-	)
-const translateSuggestion = (prop, rule, translation, lang) =>
-	assoc(
-		'suggestions',
-		Object.entries(rule.suggestions).reduce(
-			(acc, [name, value]) => ({
-				...acc,
-				[translation[`${prop}.${name}.${lang}`]?.replace(
-					/^\[automatic\] /,
-					''
-				)]: value
-			}),
-			{}
-		),
-		rule
-	)
-
-export const attributesToTranslate = [
-	'titre',
-	'description',
-	'question',
-	'résumé',
-	'suggestions',
-	'contrôles',
-	'note'
-]
-
-export let translateAll = (translations, flatRules) => {
-	let translationsOf = rule => translations[rule.dottedName],
-		translateProp = (lang, translation) => (rule, prop) => {
-			if (prop === 'contrôles' && rule?.contrôles) {
-				return translateContrôle(prop, rule, translation, lang)
-			}
-			if (prop === 'suggestions' && rule?.suggestions) {
-				return translateSuggestion(prop, rule, translation, lang)
-			}
-			let propTrans = translation[prop + '.' + lang]
-			propTrans = propTrans?.replace(/^\[automatic\] /, '')
-			return propTrans ? assoc(prop, propTrans, rule) : rule
-		},
-		translateRule = (lang, translations, props) => rule => {
-			let ruleTrans = translationsOf(rule)
-			return ruleTrans
-				? reduce(translateProp(lang, ruleTrans), rule, props)
-				: rule
-		}
-	return map(
-		translateRule('en', translations, attributesToTranslate),
-		flatRules
-	)
-}
-
 export let findParentDependencies = (rules, rule) => {
 	// A parent dependency means that one of a rule's parents is not just a namespace holder, it is a boolean question. E.g. is it a fixed-term contract, yes / no
 	// When it is resolved to false, then the whole branch under it is disactivated (non applicable)
diff --git a/source/engine/translateRules.ts b/source/engine/translateRules.ts
new file mode 100644
index 000000000..26716c2c1
--- /dev/null
+++ b/source/engine/translateRules.ts
@@ -0,0 +1,74 @@
+import { assoc } from 'ramda'
+
+/* Traduction */
+const translateContrôle = (prop, rule, translation, lang) =>
+	assoc(
+		'contrôles',
+		rule.contrôles.map((control, i) => ({
+			...control,
+			message: translation[`${prop}.${i}.${lang}`]?.replace(
+				/^\[automatic\] /,
+				''
+			)
+		})),
+		rule
+	)
+
+const translateSuggestion = (prop, rule, translation, lang) =>
+	assoc(
+		'suggestions',
+		Object.entries(rule.suggestions).reduce(
+			(acc, [name, value]) => ({
+				...acc,
+				[translation[`${prop}.${name}.${lang}`]?.replace(
+					/^\[automatic\] /,
+					''
+				)]: value
+			}),
+			{}
+		),
+		rule
+	)
+
+export const attributesToTranslate = [
+	'titre',
+	'description',
+	'question',
+	'résumé',
+	'suggestions',
+	'contrôles',
+	'note'
+]
+
+const translateProp = (lang, translation) => (rule, prop) => {
+	if (prop === 'contrôles' && rule?.contrôles) {
+		return translateContrôle(prop, rule, translation, lang)
+	}
+	if (prop === 'suggestions' && rule?.suggestions) {
+		return translateSuggestion(prop, rule, translation, lang)
+	}
+	let propTrans = translation[prop + '.' + lang]
+	propTrans = propTrans?.replace(/^\[automatic\] /, '')
+	return propTrans ? assoc(prop, propTrans, rule) : rule
+}
+
+const translateRule = (lang, translations, name, rule) => {
+	let ruleTrans = translations[name]
+	if (!ruleTrans) {
+		return rule
+	}
+	return attributesToTranslate.reduce(
+		translateProp(lang, ruleTrans),
+		rule ?? {}
+	)
+}
+
+export default function translateRules(lang, translations, rules) {
+	const translatedRules = Object.fromEntries(
+		Object.entries(rules).map(([name, rule]) => [
+			name,
+			translateRule(lang, translations, name, rule)
+		])
+	)
+	return translatedRules
+}
diff --git a/source/locales/en.yaml b/source/locales/en.yaml
index 92fdc1115..d26cb8326 100644
--- a/source/locales/en.yaml
+++ b/source/locales/en.yaml
@@ -1,6 +1,7 @@
 '404':
   action: Return to safe place
   message: This page does not exist or no longer exists
+'<0>Covid-19 et chômage partiel </0>: <3>Calculez votre indemnité</3>': '<0>Covid-19 and Short-Time </0>Work: <3>Calculate Your Benefit</3>'
 <0>Oui</0>: <0>Yes</0>
 A quoi servent mes cotisations ?: What's included in my contributions?
 Accueil: Home
@@ -60,7 +61,7 @@ Gérant minoritaire: Managing director
 Habituellement: Usually
 Imprimer: Print
 Impôts: Taxes
-'Indemnité chômage partiel prise en charge par l''état :': 'State-paid short-time working allowance :'
+"Indemnité chômage partiel prise en charge par l'état :": 'State-paid short-time working allowance :'
 Indépendant: Independent
 International: International
 Intégrer l'interface de simulation: Integrate the simulation interface
@@ -77,7 +78,7 @@ Mon entreprise: My company
 Mon revenu: My income
 Montant: Amount
 Montant des cotisations: Amount of contributions
-'Nom de l''entreprise ou SIREN ': Company name or SIREN code
+"Nom de l'entreprise ou SIREN ": Company name or SIREN code
 Non: 'No'
 Nous n'avons rien trouvé: We didn't find any matching registered company.
 Oui: 'Yes'
@@ -142,7 +143,7 @@ Taux: Rate
 Taux calculé: Calculated rate
 Taux moyen: Average rate
 Total des retenues: Total withheld
-'Total payé par l''entreprise :': 'Total paid by the company :'
+"Total payé par l'entreprise :": 'Total paid by the company :'
 Tout effacer: Delete all
 Tranche de l'assiette: Scale bracket
 Un seul associé: Only one partner
@@ -401,9 +402,7 @@ coronavirus:
     <0>Coronavirus and short-time working: what impact on my income?</0><1>The
     government is putting in place measures to support employees affected by the
     Coronavirus crisis. One of the key measures is the assumption of the entire
-    short-time working compensation by the State.</1><2>This simulator allows
-    you to find out your net income if you have been placed on short-time work,
-    as well as the total cost to the company.</2>
+    short-time working compensation by the State.</1>
   page:
     description: Estimate net income with short-time working benefits
     titre: 'Coronavirus and short-time working: what impact on your income?'
diff --git a/source/reducers/rootReducer.ts b/source/reducers/rootReducer.ts
index e322f124d..3e1f31910 100644
--- a/source/reducers/rootReducer.ts
+++ b/source/reducers/rootReducer.ts
@@ -1,24 +1,21 @@
 import { Action } from 'Actions/actions'
 import { Unit } from 'Engine/units'
+import originRules from 'Publicode/rules'
 import { defaultTo, identity, omit, without } from 'ramda'
 import reduceReducers from 'reduce-reducers'
 import { combineReducers, Reducer } from 'redux'
 import { analysisWithDefaultsSelector } from 'Selectors/analyseSelectors'
 import { SavedSimulation } from 'Selectors/storageSelectors'
-import { DottedName } from 'Types/rule'
+import { DottedName, Rules } from 'Types/rule'
 import i18n, { AvailableLangs } from '../i18n'
 import { areUnitConvertible, convertUnit, parseUnit } from './../engine/units'
 import inFranceAppReducer, { Company } from './inFranceAppReducer'
 import storageRootReducer from './storageReducer'
 
-function rules(state = null, action) {
-	switch (action.type) {
-		case 'SET_RULES':
-			return action.rules
-		default:
-			return state
-	}
+function rules(state: Rules = originRules) {
+	return state
 }
+
 function explainedVariable(
 	state: DottedName | null = null,
 	action: Action
diff --git a/source/selectors/analyseSelectors.ts b/source/selectors/analyseSelectors.ts
index 67542f619..ab6e62927 100644
--- a/source/selectors/analyseSelectors.ts
+++ b/source/selectors/analyseSelectors.ts
@@ -5,7 +5,6 @@ import {
 	disambiguateRuleReference,
 	splitName
 } from 'Engine/ruleUtils'
-import rules from 'Publicode/rules'
 import {
 	add,
 	difference,
@@ -54,9 +53,7 @@ let configSelector = (state: RootState) => state.simulation?.config || {}
 // hot-reloading on developement). See
 // https://github.com/betagouv/mon-entreprise/issues/912
 // TOTO
-const rulesEn = rules
-let flatRulesSelector = (state: RootState) =>
-	state.rules ?? (state.lang === 'en' ? rulesEn : rules)
+let flatRulesSelector = (state: RootState) => state.rules
 
 // We must here compute parsedRules, flatRules, analyse which contains both
 // targets and cache objects
diff --git a/source/sites/mon-entreprise.fr/App.tsx b/source/sites/mon-entreprise.fr/App.tsx
index 217803277..21dcc3cd7 100644
--- a/source/sites/mon-entreprise.fr/App.tsx
+++ b/source/sites/mon-entreprise.fr/App.tsx
@@ -55,7 +55,7 @@ const middlewares = [
 	trackSimulatorActions(tracker)
 ]
 
-function InFranceRoute({ basename, language }) {
+function InFranceRoute({ basename, language, rules }) {
 	useEffect(() => {
 		getSessionStorage()?.setItem('lang', language)
 	}, [language])
@@ -73,7 +73,8 @@ function InFranceRoute({ basename, language }) {
 			}}
 			initialStore={{
 				...retrievePersistedState(),
-				previousSimulation: retrievePersistedSimulation()
+				previousSimulation: retrievePersistedSimulation(),
+				rules
 			}}
 		>
 			<RouterSwitch />
diff --git a/source/sites/mon-entreprise.fr/entry.en.tsx b/source/sites/mon-entreprise.fr/entry.en.tsx
index c4ef853de..7f081817e 100644
--- a/source/sites/mon-entreprise.fr/entry.en.tsx
+++ b/source/sites/mon-entreprise.fr/entry.en.tsx
@@ -1,8 +1,19 @@
 import 'core-js/stable'
+import { translateRules } from 'Engine'
+import rules from 'Publicode/rules'
 import React from 'react'
 import { render } from 'react-dom'
 import 'regenerator-runtime/runtime'
+import translations from '../../locales/rules-en.yaml'
 import App from './App'
 
 let anchor = document.querySelector('#js')
-render(<App language="en" basename="infrance" />, anchor)
+console.log(translateRules('en', translations, rules))
+render(
+	<App
+		language="en"
+		basename="infrance"
+		rules={translateRules('en', translations, rules)}
+	/>,
+	anchor
+)
diff --git a/source/sites/mon-entreprise.fr/entry.fr.tsx b/source/sites/mon-entreprise.fr/entry.fr.tsx
index d33bc59e6..2be9019d4 100644
--- a/source/sites/mon-entreprise.fr/entry.fr.tsx
+++ b/source/sites/mon-entreprise.fr/entry.fr.tsx
@@ -1,8 +1,9 @@
 import 'core-js/stable'
+import rules from 'Publicode/rules'
 import React from 'react'
 import { render } from 'react-dom'
 import 'regenerator-runtime/runtime'
 import App from './App'
 
 let anchor = document.querySelector('#js')
-render(<App language="fr" basename="mon-entreprise" />, anchor)
+render(<App language="fr" basename="mon-entreprise" rules={rules} />, anchor)
diff --git a/source/sites/mon-entreprise.fr/pages/Coronavirus.tsx b/source/sites/mon-entreprise.fr/pages/Coronavirus.tsx
index 94937f1ae..25b78ed3e 100644
--- a/source/sites/mon-entreprise.fr/pages/Coronavirus.tsx
+++ b/source/sites/mon-entreprise.fr/pages/Coronavirus.tsx
@@ -139,17 +139,20 @@ function ExplanationSection() {
 								netHabituel,
 								{
 									...net,
-									additionalText: (
+									additionalText: language === 'fr' && (
 										<>
-											Soit{' '}
-											<strong>
-												{formatValue({
-													value: (net.nodeValue / netHabituel.nodeValue) * 100,
-													unit: '%',
-													maximumFractionDigits: 0
-												})}
-											</strong>{' '}
-											du revenu net
+											<Trans>
+												Soit{' '}
+												<strong>
+													{formatValue({
+														value:
+															(net.nodeValue / netHabituel.nodeValue) * 100,
+														unit: '%',
+														maximumFractionDigits: 0
+													})}
+												</strong>{' '}
+												du revenu net
+											</Trans>
 										</>
 									)
 								}
@@ -159,7 +162,7 @@ function ExplanationSection() {
 								totalEntrepriseHabituel,
 								{
 									...totalEntreprise,
-									additionalText: (
+									additionalText: language === 'fr' && (
 										<>
 											Soit{' '}
 											<strong>
diff --git a/source/sites/mon-entreprise.fr/pages/Simulateurs/Salarié.tsx b/source/sites/mon-entreprise.fr/pages/Simulateurs/Salarié.tsx
index 7232bc392..74fb2de30 100644
--- a/source/sites/mon-entreprise.fr/pages/Simulateurs/Salarié.tsx
+++ b/source/sites/mon-entreprise.fr/pages/Simulateurs/Salarié.tsx
@@ -162,8 +162,10 @@ export let SalarySimulation = () => {
 			/>
 			<br />
 			<Banner icon={'😷'}>
-				<strong>Covid-19 et chômage partiel </strong>:{' '}
-				<Link to={sitePaths.coronavirus}>Calculez votre indemnité</Link>
+				<Trans>
+					<strong>Covid-19 et chômage partiel </strong>:{' '}
+					<Link to={sitePaths.coronavirus}>Calculez votre indemnité</Link>
+				</Trans>
 			</Banner>
 			<PreviousSimulationBanner />
 		</>
diff --git a/source/sites/publi.codes/App.js b/source/sites/publi.codes/App.js
index 1e561c81e..3841095ad 100644
--- a/source/sites/publi.codes/App.js
+++ b/source/sites/publi.codes/App.js
@@ -10,25 +10,12 @@ import Landing from './Landing'
 import Studio from './LazyStudio'
 import Mécanismes from './Mécanismes'
 
-function Router({ language }) {
+function Router({ language, rules }) {
 	useEffect(() => {
 		getSessionStorage()?.setItem('lang', language)
 	}, [language])
-	const rules = language === 'en' ? rules : rules
 	return (
-		<Provider
-			basename="publicodes"
-			language={language}
-			reduxMiddlewares={[]}
-			initialStore={{
-				rules,
-				simulation: {
-					config: {
-						objectifs: []
-					}
-				}
-			}}
-		>
+		<Provider basename="publicodes" language={language} rules={rules}>
 			<RouterSwitch />
 		</Provider>
 	)
diff --git a/source/types/rule.ts b/source/types/rule.ts
index 99f2ac00c..45ca571b0 100644
--- a/source/types/rule.ts
+++ b/source/types/rule.ts
@@ -2,6 +2,9 @@ import { Unit } from 'Engine/units'
 import jsonRules from './dottednames.json'
 export type DottedName = keyof typeof jsonRules
 
+// TODO : différencier Rule et ParsedRule
+export type Rules = { [key in DottedName]: Rule }
+
 export type Rule = {
 	dottedName: DottedName
 	question?: string