UI: fix i18n toggle

.changeset/mighty-points-fold.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-ui': patch
+---
+
+Fix i18n toggle

packages/ui/src/i18n.tsx

@@ -43,14 +43,14 @@ export function I18nProvider({
   const router = useRouter();
   const pathname = usePathname();
 
-  const onChangeCallback = (locale: string) => {
+  const onChangeCallback = (value: string) => {
     const segments = pathname.split('/').filter((v) => v.length > 0);
 
     // If locale prefix hidden
     if (segments[0] !== locale) {
-      segments.unshift(locale);
+      segments.unshift(value);
     } else {
-      segments[0] = locale;
+      segments[0] = value;
     }
 
     router.push(`/${segments.join('/')}`);