Is banjo a popular instrument in Ukraine?
Definitely not :)
They have their own
What is the difference in грати у and грати на?
you usually play "у" game and "на" instrument (грати у футбол, грати на гітарі)
So, he loves to play the banjo is not accepted (Google translate accepted it btw). So, how do you say that?
What is the meaning of на here?