I know some, I guess, hope I do not butcher them:
German(native): Bitte/ Danke (sehr) or Vielen Dank,
English: please/ thank you (very much),
Japanese: どうぞ or おねがいします or ください/ (どうも)ありがとう(ございます) (Which is douzo (when you offer someone something, I think, onegaishimasu/kudasai (if you want something or someone to do something, which is following the request.)/ (domo)arigatou(gozaimasu),
Norwegian: vær så snill / (tusen) takk,
(Which is like "Sei so gut/lieb"/ "Tausend Dank" in German.),
Romanian: vă rog or te rog (formal/informal)/ mulțumesc ((foarte) mult) or mersi (mult) (ă is a short a, I guess and ț is like the ts from "its", or a German z)
French: s'il vous plait (that one I had to look up on how to write)/ merci
Polish: proszę (bardzo)/ dzięki or dziękuję (bardzo) (Like proshe/ djenki/djenkuje)(ę is nasalized)
Portuguese: faz favor or por favor/ obrigado or obrigada (male/female) (o is spoken like an u) (I do not know much Portuguese (like French and Polish), in my book (European Portuguese faz favor and por favor are used, but I do not know the differences.)