diff --git a/index.html b/index.html
index 4a40ea8..226481a 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,7 @@
 <title>Devenir Ingouvernable : Échapper à Chat Control</title>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
-<script>document.documentElement.setAttribute('data-lang','fr');document.documentElement.setAttribute('lang','fr');</script>
+<script>(function(){try{var s=localStorage.getItem('lang');var b=(navigator.language||navigator.userLanguage||'en').toLowerCase();var l=s||(b.indexOf('fr')===0?'fr':'en');document.documentElement.setAttribute('data-lang',l);document.documentElement.setAttribute('lang',l);}catch(e){document.documentElement.setAttribute('data-lang','fr');document.documentElement.setAttribute('lang','fr');}})();</script>
 <style>
   /* ============ TOKENS ============ */
   :root{