Language / Should I learn Polish or she learn English? [83]

It's simple. If you're serious about it learn POlish. She needs to learn English as she lives there, irrespective of you being there. It just takes time. My fiancee went from B1 to C1 in 2 years of skype calls with me and meeting up in school holidays and I only corrected her when she made a mistake. Polish is very difficult for non natives so you have to stick with it, but it's a great language to speak as not many people can. I am still basic after 3 years of living here but I can get by. Find a Polish class at night school and find some local Polish people and try to converse with them.