"The atheist is talking with the Muslim."

Translation: Ateista rozmawia z muzułmaninem.

[Meikel100]

My response, "ateista mówi z muzułmaninem", should be accepted.

[Jellei]

OK, we decided to accept it, but I strongly recommend using "rozmawia z".

[black-drozd]

Why "ateista", not "ateist"?

[alik1989]

This is the original Latin form, if I'm not mistaken. And it's pretty common, actually.

https://en.wiktionary.org/wiki/-ista

[black-drozd]

I see, Polish language likes latin forms :)