diff --git a/index.html b/index.html
index ef4afbd..bd88903 100755
--- a/index.html
+++ b/index.html
@@ -82,14 +82,14 @@
 
                 <!-- Action & Language Toggle -->
                 <div class="flex items-center space-x-3">
-                    <!-- Language Switcher (VI / RU / EN / ZH / DE / FR) -->
+                    <!-- Language Switcher -->
                     <div class="bg-gray-100 p-1 rounded-xl flex items-center shadow-inner text-xs">
-                        <button onclick="setLanguage('vi')" id="btn-vi" class="px-2.5 py-1.5 font-bold rounded-lg transition bg-white text-brand-600 shadow-sm">VI</button>
-                        <button onclick="setLanguage('ru')" id="btn-ru" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">RU</button>
-                        <button onclick="setLanguage('en')" id="btn-en" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">EN</button>
-                        <button onclick="setLanguage('zh')" id="btn-zh" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">中文</button>
-                        <button onclick="setLanguage('de')" id="btn-de" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">DE</button>
-                        <button onclick="setLanguage('fr')" id="btn-fr" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">FR</button>
+                        <button onclick="setLanguage('vi')" id="btn-vi" aria-label="Tiếng Việt" title="Tiếng Việt" class="px-2.5 py-1.5 font-bold rounded-lg transition bg-white text-brand-600 shadow-sm">🇻🇳</button>
+                        <button onclick="setLanguage('ru')" id="btn-ru" aria-label="Русский" title="Русский" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">🇷🇺</button>
+                        <button onclick="setLanguage('en')" id="btn-en" aria-label="English" title="English" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">🇬🇧</button>
+                        <button onclick="setLanguage('zh')" id="btn-zh" aria-label="中文" title="中文" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">🇨🇳</button>
+                        <button onclick="setLanguage('de')" id="btn-de" aria-label="Deutsch" title="Deutsch" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">🇩🇪</button>
+                        <button onclick="setLanguage('fr')" id="btn-fr" aria-label="Français" title="Français" class="px-2.5 py-1.5 font-bold rounded-lg transition text-gray-600">🇫🇷</button>
                     </div>
 
                     <a href="#booking" class="hidden sm:inline-flex items-center justify-center px-4 py-2.5 bg-brand-500 hover:bg-brand-600 text-white text-sm font-semibold rounded-xl shadow-lg shadow-brand-500/25 transition transform hover:-translate-y-0.5" data-i18n="nav_cta">