diff --git a/.changeset/spicy-tigers-fix.md b/.changeset/spicy-tigers-fix.md
new file mode 100644
index 00000000000..03f84868bdc
--- /dev/null
+++ b/.changeset/spicy-tigers-fix.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/starlight': patch
+---
+
+Adds Traditional Chinese UI translations
diff --git a/packages/starlight/translations/index.ts b/packages/starlight/translations/index.ts
index 66e83132558..abe740da7ff 100644
--- a/packages/starlight/translations/index.ts
+++ b/packages/starlight/translations/index.ts
@@ -24,6 +24,7 @@ import ru from './ru.json';
 import vi from './vi.json';
 import uk from './uk.json';
 import hi from './hi.json';
+import zhTW from './zh-TW.json';
 
 const { parse } = builtinI18nSchema();
 
@@ -54,5 +55,6 @@ export default Object.fromEntries(
 		vi,
 		uk,
 		hi,
+		'zh-TW': zhTW,
 	}).map(([key, dict]) => [key, parse(dict)])
 );
diff --git a/packages/starlight/translations/zh-TW.json b/packages/starlight/translations/zh-TW.json
new file mode 100644
index 00000000000..a372ec733ec
--- /dev/null
+++ b/packages/starlight/translations/zh-TW.json
@@ -0,0 +1,26 @@
+{
+  "skipLink.label": "跳到內容",
+  "search.label": "搜尋",
+  "search.shortcutLabel": "（按 / 鍵開始搜尋）",
+  "search.cancelLabel": "取消",
+  "search.devWarning": "正式版本才能使用搜尋功能。\n如要在本地測試，請先建置並預覽網站。",
+  "themeSelect.accessibleLabel": "選擇佈景主題",
+  "themeSelect.dark": "深色",
+  "themeSelect.light": "淺色",
+  "themeSelect.auto": "自動",
+  "languageSelect.accessibleLabel": "選擇語言",
+  "menuButton.accessibleLabel": "選單",
+  "sidebarNav.accessibleLabel": "主要",
+  "tableOfContents.onThisPage": "本頁內容",
+  "tableOfContents.overview": "概述",
+  "i18n.untranslatedContent": "本頁內容尚未翻譯。",
+  "page.editLink": "編輯頁面",
+  "page.lastUpdated": "最後更新於：",
+  "page.previousLink": "前一則",
+  "page.nextLink": "下一則",
+  "404.text": "找不到頁面。請檢查網址或改用搜尋功能。",
+  "aside.note": "注意",
+  "aside.tip": "提示",
+  "aside.caution": "警告",
+  "aside.danger": "危險"
+}