When using the Danish interface on the Home page (I’m on the website, haven’t checked the app), there’s a bug where it shows course progress, so it says “300 / _ _ alle _ _ ord lært” (“300 / _ _ all _ _ words learned”) instead of “300 / 400 ord lært” (looks like the translator misunderstood the syntax ;))
(I had to add some spaces in the text above, to avoid the underscores being interpreted as bold/italic by the forum software.)
ETA: I also noticed when creating a new course, one option is Gerogisk instead of Georgisk and Valisisk instead of Walisisk - and there are various other things that just sound awkward/clumsy. Please let me know if I can help improve it.