AI: address review on PR #475

frontend/src/components/TopNav.tsx

@@ -12,9 +12,7 @@ import TopNavUser from '@/components/TopNavUser'
 import TranslatedText from '@/components/TranslatedText'
 import { toast } from '@/components/ui/use-toast'
 import { WikiIdBus } from '@/lib/eventBus/WikiIdBus'
-import { isLocaleCode,
-	 isUILocaleCode,
-	 MONGOLIAN_LOCALE,
+import { isUILocaleCode,
 	 switchLocalePath,
 	 uiLocaleFromPath,
 	 unlocalisedPath } from '@/lib/locales'
@@ -141,8 +139,7 @@ const TopNav: FC<Props> = ({ user, locales, resolveLocaleSwitch }) => {
   const locale = useLocale ()
   const uiLocale = useUILocale ()
   const verticalPreview = useVerticalPreview ()
-  const uiLocales = [...locales.filter (entry => isLocaleCode (entry.code)),
-      ...(locales.some (entry => entry.code === 'ja') ? [MONGOLIAN_LOCALE] : [])]
+  const uiLocales = locales.filter (entry => isUILocaleCode (entry.code))
   const localeName = uiLocales.find (entry => entry.code === uiLocale)?.name
   const navigate = useLocaleNavigate ()
   const location = useLocation ()