Polish speakers are generally polite, even when they are in the middle of an argument. It is not uncommon to say the equivalent of, 'Sir, you are an idiot."
If a Polish speaker calls someone a 'bitch' it isn't meant as an insult. This means essentially the same thing as in English saying 'to be'.
Polish speakers often mix up saying 'thank you' versus 'hello'.
The polish language is well known for its sense of humor, this includes jokes about doctors, blondes and even mother-in-law’s.
For speakers of Polish, they will find it easier to learn Slavic languages such as Czech, than other near Asian languages.