diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 78707c2..0b9c52e 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -1,5 +1,6 @@
 import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
+import Script from "next/script";
 
 import { Providers } from "@/components/providers";
 import "./globals.css";
@@ -37,7 +38,9 @@ export default function RootLayout({
       className={`${geistSans.variable} ${geistMono.variable} h-full antialiased`}
     >
       <head>
-        <script dangerouslySetInnerHTML={{ __html: ADMIN_LOCALE_BOOTSTRAP }} />
+        <Script id="admin-locale-bootstrap" strategy="beforeInteractive">
+          {ADMIN_LOCALE_BOOTSTRAP}
+        </Script>
       </head>
       <body className="flex min-h-full flex-col">
         <Providers>{children}</Providers>
diff --git a/src/components/admin/login-form.tsx b/src/components/admin/login-form.tsx
index 890af37..0eeb4dd 100644
--- a/src/components/admin/login-form.tsx
+++ b/src/components/admin/login-form.tsx
@@ -8,6 +8,7 @@ import { toast } from "sonner";
 import { isAxiosError } from "axios";
 
 import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
+import { AdminLanguageSwitcher } from "@/components/admin/admin-language-switcher";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
@@ -121,6 +122,9 @@ export function LoginForm() {
 
   return (
     <div className="relative flex min-h-full flex-1 flex-col items-center justify-center overflow-hidden px-4 py-14 sm:py-20">
+      <div className="absolute right-4 top-4 z-20 sm:right-6 sm:top-6">
+        <AdminLanguageSwitcher />
+      </div>
       <div
         aria-hidden
         className="pointer-events-none absolute inset-0 bg-[radial-gradient(ellipse_85%_50%_at_50%_-5%,rgb(59_130_246/0.09),transparent)] dark:bg-[radial-gradient(ellipse_85%_50%_at_50%_-5%,rgb(56_189_248/0.12),transparent)]"
diff --git a/src/i18n/index.ts b/src/i18n/index.ts
index f9d1eeb..186166b 100644
--- a/src/i18n/index.ts
+++ b/src/i18n/index.ts
@@ -6,7 +6,6 @@ import { initReactI18next } from "react-i18next";
 import {
   adminHtmlLang,
   applyAdminUiLocale,
-  getStoredAdminUiLocale,
   hydrateAdminUiLocale,
   type AdminApiLocale,
 } from "@/lib/admin-locale";
@@ -124,16 +123,9 @@ export function normalizeAdminLanguage(lang: string | undefined): AdminLanguage
 }
 
 function getInitialAdminLanguage(): AdminLanguage {
-  if (typeof window === "undefined") {
-    return ADMIN_DEFAULT_LANGUAGE;
-  }
-
-  const stored = getStoredAdminUiLocale();
-  if (stored) {
-    return stored;
-  }
-
-  return normalizeAdminLanguage(document.documentElement.lang);
+  // Keep SSR and first client render aligned to avoid hydration mismatch.
+  // Stored locale is applied after mount in `Providers`.
+  return ADMIN_DEFAULT_LANGUAGE;
 }
 
 function syncAdminLanguage(lang: AdminLanguage): void {
