diff --git a/src/frontend/langs/index.ts b/src/frontend/langs/index.ts
index 2df35b2..e4f96e5 100644
--- a/src/frontend/langs/index.ts
+++ b/src/frontend/langs/index.ts
@@ -2,6 +2,9 @@ import jaJP from './ja-JP.json';
 import enUS from './en-US.json';
 import koKR from './ko-KR.json';
 import jaCR from './ja-cr.json';
+import itIT from './it-IT.json';
+import zhCN from './zh-CN.json';
+import zhTW from './zh-TW.json';
 
 import deepmerge from 'deepmerge';
 
@@ -17,6 +20,9 @@ export const resources = {
   'ja_JP': { translation: jaJP },
   'en_US': { translation: _enUS },
   'ko_KR': { translation: merge(_enUS, koKR) },
+  'it_IT': { translation: merge(_enUS, itIT) },
+  'zh_CN': { translation: merge(_enUS, zhCN) },
+  'zh_TW': { translation: merge(_enUS, zhTW) },
   'ja_CR': { translation: merge(jaJP, jaCR) },
 };
 
@@ -24,6 +30,9 @@ export const languageName = {
   'ja_JP': '日本語',
   'en_US': 'English',
   'ko_KR': '한국어',
+  'it_IT': 'Italiano',
+  'zh_CN': '简体中文',
+  'zh_TW': '繁體中文',
   'ja_CR': '怪レい日本语',
 } as const;
 
diff --git a/src/frontend/langs/ja-JP.json b/src/frontend/langs/ja-JP.json
index cadbeb4..f47e39a 100644
--- a/src/frontend/langs/ja-JP.json
+++ b/src/frontend/langs/ja-JP.json
@@ -1,4 +1,5 @@
 {
+	"$languageName": "日本語",
 	"title": "Misskey Tools",
 	"description1": "Misskeyをもっと効果的に。様々な機能を持ったオールインワンツール。",
 	"description2": "お使いのインスタンスURLを入力して、今すぐMisskey Toolsを使おう！",