Currently, approved or live apps are displaying English as the language localization, even when they are set to German, Dutch, or another language.
See screenshot:

Although the app is published in the customer’s chosen language, the App Store shows the language localization as “EN” (English).
This is currently the default for all BuddyBoss apps. Our developers are aware of it and will address it in future updates to the BuddyBoss app.