diff --git a/quiz-app/src/App.vue b/quiz-app/src/App.vue
index 7890cf0e..2affc7f5 100644
--- a/quiz-app/src/App.vue
+++ b/quiz-app/src/App.vue
@@ -9,7 +9,7 @@
         <option>id</option>
         <option>hi</option>
         <option>it</option>
-        <option>zh-tw</option>
+        <option>zh_tw</option>
       </select>
     </nav>
     <div id="app">
diff --git a/quiz-app/src/assets/translations/index.js b/quiz-app/src/assets/translations/index.js
index c9ed38a0..9b5bcab4 100644
--- a/quiz-app/src/assets/translations/index.js
+++ b/quiz-app/src/assets/translations/index.js
@@ -5,7 +5,7 @@ import id from './id.json';
 import hi from './hi.json';
 import it from './it.json';
 import ja from './ja.json';
-import zh-tw from './zh-tw.json';
+import zh_tw from './zh_tw.json';
 
 //export const defaultLocale = 'en';
 
@@ -16,7 +16,7 @@ const messages = {
 	hi: hi[0],
 	it: it[0],
 	ja: ja[0],
-	zh-tw: zh-tw[0],
+	zh_tw: zh_tw[0],
 };
 
 export default messages;
diff --git a/quiz-app/src/assets/translations/zh-tw.json b/quiz-app/src/assets/translations/zh_tw.json
similarity index 99%
rename from quiz-app/src/assets/translations/zh-tw.json
rename to quiz-app/src/assets/translations/zh_tw.json
index 6a54b33b..394f7376 100644
--- a/quiz-app/src/assets/translations/zh-tw.json
+++ b/quiz-app/src/assets/translations/zh_tw.json
@@ -2,7 +2,7 @@
 	{
 		"title": "給初學者的網頁開發：小測驗",
 		"complete": "恭喜，您完成了所有試題!",
-		"error": "抱歉。請稍後再試。」",
+		"error": "抱歉。請稍後再試。",
 		"quizzes": [
 			{
 				"id": 1,