The most important thing in communicating with Poles is the way of speaking-don't be too verbose, and try to express your meaning in the simplest words. For foreigners, we are all like philosophers, hehe.

As for taboos, don't make random comments about Nazi Germany's aggression experience without knowing much. You can ask questions.

Also, Poles like to make fun of their own government team. They always mention that their president or prime minister is stupid. But you just have to go along with it, and don't take it and talk endlessly about this topic. In fact, they also care about it, but they like to vent their dissatisfaction, but they don't like outsiders' comments.