I haven't configured my language to Polish in any of the Google's sites ever. I am not living near Poland. My account language is English. Even when I'm logged out, Google Analytics is Polish to me.
I wanted to change the language to English. I have tried other solutions but they were no good for me. It is funny that this exact tool is used to learn visitors language/region.
Best Answer
Ok. I found the solution. Before logging in, there is a language selection at the bottom-right of the page.
I couldn't find it because it was in Polish... Still can't understand why Google don't use general Google language settings on Google Analytics.