diff --git a/src/lib/i18n.ts b/src/lib/i18n.ts
index 83c8ed4..a6d4426 100644
--- a/src/lib/i18n.ts
+++ b/src/lib/i18n.ts
@@ -189,9 +189,16 @@ export const translations = {
 };
 
 export function useLanguage() {
-  const [lang, setLangState] = useState<Language>(() => {
-    return (localStorage.getItem('lang') as Language) || 'pt';
-  });
+  const [lang, setLangState] = useState<Language>('pt');
+
+  useEffect(() => {
+    if (typeof window !== 'undefined') {
+      const saved = localStorage.getItem('lang');
+      if (saved && (translations as any)[saved]) {
+        setLangState(saved as Language);
+      }
+    }
+  }, []);
 
   useEffect(() => {
     const handleLangChange = (e: Event) => {
@@ -202,10 +209,12 @@ export function useLanguage() {
   }, []);
 
   const setLang = (l: Language) => {
-    localStorage.setItem('lang', l);
+    if (typeof window !== 'undefined') {
+      localStorage.setItem('lang', l);
+    }
     setLangState(l);
     window.dispatchEvent(new CustomEvent('lang-change', { detail: l }));
   };
 
-  return { lang, setLanguage: setLang, setLang, t: translations[lang] };
+  return { lang, setLanguage: setLang, setLang, t: (translations as any)[lang] || translations.pt };
 }