src/app/page.tsx

@@ -17,8 +17,10 @@ export default function LandingPage() {
 
   useEffect(() => {
     const saved = localStorage.getItem('lang') || 'en';
-    setLang(saved);
-  }, []);
+    if (saved !== lang) {
+      setLang(saved);
+    }
+  }, [lang]);
 
   const toggleLang = () => {
     const next = lang === 'en' ? 'es' : 'en';