diff --git a/assets/javascripts/app.js b/assets/javascripts/app.js
index 1632f70..022ea5c 100644
--- a/assets/javascripts/app.js
+++ b/assets/javascripts/app.js
@@ -3476,5 +3476,117 @@ $(document).ready(function () {
   //     ORBITFRONT.member.equalHeight('.i-member-item-inner');
   //   }
   // });
+  $(function() {
+    function fixLangSwitchA11y() {
+        setTimeout(function() {
+
+            // ✅ 語系切換主按鈕補上 role="button" aria-haspopup aria-expanded
+            var $langSwitch = $('.lang-switch');
+            $langSwitch.attr({
+                'role': 'button',
+                'aria-haspopup': 'true',
+                'aria-expanded': 'false',
+                'aria-label': '語系切換，展開語言選單'
+            });
+
+            // ✅ Google Translate 旗幟語言項目：補上 role="button" aria-pressed 和 aria-label
+            // 取得目前語系
+            function getCurrentLang() {
+                var cookieLang = document.cookie.match(/googtrans=\/[a-z-]+\/([a-z-]+)/i);
+                if (cookieLang) return cookieLang[1].toLowerCase();
+                return 'zh-tw'; // 預設繁體中文
+            }
+
+            var langMap = {
+                'en':    'English',
+                'zh-TW': '繁體中文',
+                'ja':    '日本語',
+                'ko':    '한국어',
+                'th':    'ไทย',
+                'vi':    'Tiếng Việt'
+            };
+
+            // ✅ 處理 onclick="translateLang('xx')" 的 .lang-item
+            $('.google-translate-flags .lang-item[onclick]').each(function() {
+                var $item = $(this);
+                var onclickVal = $item.attr('onclick') || '';
+                var match = onclickVal.match(/translateLang\('([^']+)'\)/);
+                if (!match) return;
+
+                var langCode = match[1];
+                var langName = langMap[langCode] || langCode;
+                var currentLang = getCurrentLang();
+                var isPressed = currentLang === langCode.toLowerCase();
+
+                // ✅ 移除 onclick，改用 jQuery 事件，避免語音軟體誤報
+                $item.removeAttr('onclick');
+
+                // ✅ 補上按鈕語意
+                $item.attr({
+                    'role': 'button',
+                    'tabindex': '0',
+                    'aria-label': langName + '，切換語系',
+                    'aria-pressed': isPressed ? 'true' : 'false'
+                });
+
+                // ✅ 點擊或 Enter/Space 切換語系
+                $item.off('click.langA11y keydown.langA11y');
+
+                $item.on('click.langA11y', function() {
+                    // 更新所有按鈕的 aria-pressed
+                    $('.google-translate-flags .lang-item[role="button"]').attr('aria-pressed', 'false');
+                    $(this).attr('aria-pressed', 'true');
+                    // 執行語系切換
+                    if (typeof translateLang === 'function') {
+                        translateLang(langCode);
+                    }
+                });
+
+                $item.on('keydown.langA11y', function(e) {
+                    if (e.which === 13 || e.which === 32) {
+                        e.preventDefault();
+                        $(this).trigger('click.langA11y');
+                    }
+                });
+            });
+
+            // ✅ 語系切換主按鈕展開/收合 aria-expanded
+            var $flagsDropdown = $('.google-translate-flags');
+
+            $langSwitch.off('click.langSwitchA11y').on('click.langSwitchA11y', function() {
+                var isExpanded = $(this).attr('aria-expanded') === 'true';
+                $(this).attr('aria-expanded', isExpanded ? 'false' : 'true');
+                $(this).attr('aria-label', isExpanded ? '語系切換，展開語言選單' : '語系切換，收合語言選單');
+            });
+
+            // ✅ 焦點離開語系選單時收合
+            $('.lang-switch-wrapper').on('focusout', function() {
+                setTimeout(function() {
+                    if (!$('.lang-switch-wrapper').find(':focus').length) {
+                        $langSwitch.attr('aria-expanded', 'false');
+                        $langSwitch.attr('aria-label', '語系切換，展開語言選單');
+                    }
+                }, 150);
+            });
+
+            // ✅ 補上旗幟圖片的 alt（避免語音報讀空值或檔名）
+            $('.google-translate-flags .lang-item[role="button"] img').each(function() {
+                var $img = $(this);
+                var $span = $img.siblings('span');
+                var langName = $span.text().trim();
+                $img.attr('alt', langName + ' 國旗');
+            });
+
+            // ✅ GoogleTranslate 標題列不需要被聚焦
+            $('.lang-item.GoogleTranslate').attr({
+                'aria-hidden': 'true',
+                'tabindex': '-1'
+            });
+
+        }, 500);
+    }
+
+    fixLangSwitchA11y();
+});
 
 }(jQuery, window));