I haven't seen any Japanese at all in the dropdown menu for quite some time, though this wasn't always the case, as I still have some screenshots from testing previous versions of the app which do show Japanese there. This problem seems to be specific to the menu, as the dictionary and inbox on the navbar both show Japanese.
Well, the previous versions had Japanese in it because the app was using the navigation from the website itself. In the new version, it doesn't load the website's navigation, and instead generates a nav bar inside of the app, if that makes sense. It's the first step in the long journey of getting the app to have some functionality even without an internet connection.