No. The Polish word for soldier is żołnierz. There is a Polish word "sołdat", which is a borrowing of the Russian солдат, and it's mostly used to describe Russian/Soviet soldiers and comes with a negative connotations.
Q: What does "Soldat" mean!?
A: "Soldat" or "Soldaat" means "soldier" in the following languages: german, dutch, norwegian, swedish, danish, french, slovenian, afrikaans, russian, catalan and romanian.
> Eeee, no?