Ooh there are a few Polish girls on BB!

My mum is Polish and speaks fluently, but my sister and I can only manage a few words. I think Mum's dog understands better Polish than us (she speaks to him in Polish!). My parents worked when I was young so our Babcia looked after us. Mum regrets Babcia not talking to us in Polish.

Mum will def be talking to my baby in Polish when he/she arrives.

Sorry, I know this doesn't answer your question but I think DiannaQ's recommendation is pretty good.

Good luck.