Law /
U.S. Citizen Moving to Poland - opening business? [36]
1) Will I have to relinquish my US Citizenship in order to operate my own business in Poland?
No
2) If no, is it possible to maintain dual citizenship? (The United States recognizes a dual citizenship, does Poland?)
Yes, however you should use your Polish ID while entering or leaving Poland.
3) Is it a "must" to speak fluent Polish, or will any fluency work?
You will find it easier if you have a decent degree of fluency in Polish. Not being able to speak comfortably (with or without the usual 2nd language mistakes) would put you at a disadvantage and Polish passport or not, you would be very much the outsider, not at all considered Polish.
4) How difficult is it to establish a business in Poland?
Establish in what sense? Actually setting up the legal entity is a pain in the ass as is most of the bureaucracy of running one.
5) What are the steps, that you would recommend, to be taken to establish a business in Poland?
The answer to that depends on so many factors - many to do with money.
Have you spent much time in Poland?