apply i18n

resource/locales/ja_JP/admin/admin.json

@@ -251,6 +251,9 @@
     "Directory_hierarchy_tag": "ディレクトリ階層タグ"
   },
   "slack_integration": {
+    "official_bot": "Official bot",
+    "custom_bot_without_proxy": "Custom_bot_without_proxy",
+    "custom_bot_with_proxy": "Custom bot without proxy",
     "selecting_bot_types": {
       "for_beginners": "- 初心者向け -",
       "for_intermediate": "- 中級者向け -",

src/client/js/components/Admin/SlackIntegration/SlackIntegration.jsx

@@ -125,7 +125,7 @@ const SlackIntegration = (props) => {
             onClick={() => handleBotTypeSelect('official-bot')}
           >
             <div className="card-header py-2">
-              <h2 className="text-center">Official Bot</h2>
+              <h2 className="text-center">{t('admin:slack_integration.official_bot')}</h2>
             </div>
             <div className="card-body">
               <p className="card-text">