If you are translanguage, I'm going to give some pretty obvious yet helpful advice: listen to music in that language. It's important to interact with that language as much as possible to learn and retain it. I bring this up, because I'm transgermanspeaker, and have some German bands to recommend to anyone else who may be interested:
Oomph! - I personally recommend Sandmann, Such mich find mich, Träumst du, Labyrinth, and/or Wem die Stunde Schlägt
Stahlmann - Adrenalin (translation), Süchtig (translation)
Eisbrecher - Dein Herz
Megaherz - Zombieland (translation), Menschenhasser (translation)
Rammstein (I feel like I can't leave this band out of the list) - Du Hast, Engel, Radio, Amerika, and/or Deutschland.
Note that I tried to find videos with English translations as well as German lyrics for all of the songs, but naturally a few of them will just have English translations.
Another disclaimer: most of these are metal, or at least metal adjacent (I am really bad with genres, though), so I am aware that they won't be for everyone. Either way, what better way to experience a language than through art?
