add en

apps/app/public/static/locales/en_US/translation.json

@@ -152,7 +152,7 @@
   "Page Tree": "Page Tree",
   "Bookmarks": "Bookmarks",
   "In-App Notification": "Notifications",
-  "Knowledge Assistant": "Knowledge Assistant",
+  "Knowledge Assistant": "ナレッジアシスタント",
   "original_path": "Original path",
   "new_path": "New path",
   "duplicated_path": "Duplicated path",