What is this song (Russian? Chinese?)

Cafe Society
1

Tykha nich, svyata nich
Yasnist’ bye vud zirnyts’
Dytynon’ka presvyata
Taka yasna mov zorya
Spochyvaye u sni
Spochyvaye u sni

2

http://silentnight.web.za/translate/ukranian.htm

However, I don’t speak Ukrainian, so I can’t attest to the accuracy.

3

That’s “Silent Night”, in some Slavic language, but not Polish.

4

Thanks folks. Clearly my brain refused to work once again. Good thing I can count on all of you.