diff --git a/src/common/default-template.ts b/src/common/default-template.ts
deleted file mode 100644
index 4167a68..0000000
--- a/src/common/default-template.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * デフォルトの投稿用テンプレート
- */
-export const defaultTemplate = `昨日のMisskeyの活動は
-
-ノート: {notesCount}({notesDelta})
-フォロー : {followingCount}({followingDelta})
-フォロワー :{followersCount}({followersDelta})
-
-でした。
-{url}`;
diff --git a/src/frontend/App.tsx b/src/frontend/App.tsx
index f8852ed..40f35d1 100644
--- a/src/frontend/App.tsx
+++ b/src/frontend/App.tsx
@@ -2,6 +2,8 @@ import React, { useState, useEffect, useCallback } from 'react';
 import { BrowserRouter, Link, Route, Switch, useLocation } from 'react-router-dom';
 import { Provider } from 'react-redux';
 import { useTranslation } from 'react-i18next';
+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
 
 import { IndexPage } from './pages';
 import { RankingPage } from './pages/ranking';
@@ -10,11 +12,28 @@ import { TermPage } from './pages/term';
 import { store, useSelector } from './store';
 import { ModalComponent } from './Modal';
 import { ActualTheme } from './misc/theme';
-import { ErrorCode } from '../common/types/error-code';
+import { getBrowserLanguage, resources } from './langs';
+import { LOCALSTORAGE_KEY_LANG } from './const';
 
 import 'xeltica-ui/dist/css/xeltica-ui.min.css';
 import './style.scss';
 
+document.body.classList.add('dark');
+
+if (!localStorage[LOCALSTORAGE_KEY_LANG]) {
+	localStorage[LOCALSTORAGE_KEY_LANG] = getBrowserLanguage();
+}
+
+i18n
+	.use(initReactI18next)
+	.init({
+		resources,
+		lng: localStorage[LOCALSTORAGE_KEY_LANG],
+		interpolation: {
+			escapeValue: false // react already safes from xss
+		}
+	});
+
 const AppInner : React.VFC = () => {
 	const $location = useLocation();
 
diff --git a/src/frontend/components/SettingPage.tsx b/src/frontend/components/SettingPage.tsx
index df2e02e..71f000c 100644
--- a/src/frontend/components/SettingPage.tsx
+++ b/src/frontend/components/SettingPage.tsx
@@ -3,7 +3,6 @@ import { alertModes } from '../../common/types/alert-mode';
 import { IUser } from '../../common/types/user';
 import { Visibility } from '../../common/types/visibility';
 import { useGetSessionQuery } from '../services/session';
-import { defaultTemplate } from '../../common/default-template';
 import { Card } from './Card';
 import { Theme, themes } from '../misc/theme';
 import { API_ENDPOINT, LOCALSTORAGE_KEY_TOKEN } from '../const';
@@ -141,6 +140,8 @@ export const SettingPage: React.VFC = () => {
 		}));
 	}, [dispatch]);
 
+	const defaultTemplate = t('_template.default');
+
 	return session.isLoading || !data ? (
 		<div className="skeleton" style={{width: '100%', height: '128px'}}></div>
 	) : (
diff --git a/src/frontend/init.tsx b/src/frontend/init.tsx
index b8fefe8..588b8ef 100644
--- a/src/frontend/init.tsx
+++ b/src/frontend/init.tsx
@@ -1,23 +1,6 @@
 import * as React from 'react';
 import * as ReactDOM from 'react-dom';
-import i18n from 'i18next';
-import { initReactI18next } from 'react-i18next';
 
 import { App } from './App';
-import { getBrowserLanguage, resources } from './langs';
-
-document.body.classList.add('dark');
-
-
-i18n
-	.use(initReactI18next)
-	.init({
-		resources,
-		lng: localStorage['lang'] ?? getBrowserLanguage(),
-		interpolation: {
-			escapeValue: false // react already safes from xss
-		}
-	});
-
 
 ReactDOM.render(<App/>, document.getElementById('app'));
diff --git a/src/frontend/langs/en_US.json5 b/src/frontend/langs/en_US.json5
index 6a12d14..23a022f 100644
--- a/src/frontend/langs/en_US.json5
+++ b/src/frontend/langs/en_US.json5
@@ -97,6 +97,7 @@
 		_template: {
 			description: "Customize template of your alert.",
 			description2: "Hashtag '#misshaialert' will be appended regardless of the template.",
+			default: "My Misskey activity yesterday was:\n\nNotes: {notesCount}({notesDelta})\nFollowing: {followingCount}({followingDelta})\nFollowers: {followersCount}({followersDelta})\n\n{url}",
 		},
 		_error: {
 			sorry: "Something went wrong. Please retry again.",
diff --git a/src/frontend/langs/ja_JP.json5 b/src/frontend/langs/ja_JP.json5
index 1552860..15a6410 100644
--- a/src/frontend/langs/ja_JP.json5
+++ b/src/frontend/langs/ja_JP.json5
@@ -97,6 +97,7 @@
 		_template: {
 			description: "アラートの自動投稿をカスタマイズできます。",
 			description2: "ハッシュタグ #misshaialert は、テンプレートに関わらず自動付与されます。",
+			default: "昨日のMisskeyの活動は\n\nノート: {notesCount}({notesDelta})\nフォロー : {followingCount}({followingDelta})\nフォロワー :{followersCount}({followersDelta})\n\nでした。\n{url}",
 		},
 		_error: {
 			sorry: "問題が発生しました。お手数ですが、やり直してください。",
diff --git a/src/frontend/misc/welcome-message.ts b/src/frontend/misc/welcome-message.ts
deleted file mode 100644
index b55e11f..0000000
--- a/src/frontend/misc/welcome-message.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-export const welcomeMessage = [
-	'ついついノートしすぎていませんか？',
-	'Misskey, しすぎていませんか？',
-	'今日、何ノート書いた？',
-	'10000 ノートは初心者、そう思っていませんか？',
-	'息するように Misskey、そんなあなたへ。',
-	'あなたは真の Misskey 廃人ですか？',
-];
\ No newline at end of file