Yeah, for me it sounds unnatural.
I decided to completely ignore punctuation and put 'Great you speak polish'. Obviously, it was wrong.
Great might be acceptable in America In Britain Well is the acceptable word. Great is an adjective not a an adverb.
"fluently" doesn't exactly mean "świetnie".
Also I have doubts about using Present Continous here, although maybe that's okay...
Or rather: You speak Polish fluently
I wish everything where possible was a direct translation from Polish. It would be so much easier to see the structure, and learn the language.
why wasn't you speak Polish well accepted. the answer given me was- you speak Polish great. that is a bad translation in English