Study / Is there a lot of racism in Warsaw (Brazilian student's question) [83]

So im a college student from Chicago, and im thinking to go and study abroad and one of my first options is university of Warsaw. one of the reasons i want to go there is because my school offers a good cheap deal to go for one semester. however, im Brazilian. my skin color is brown and i dont know how that is gonna affect me there. does anyone can give me feedback on this? has anyone experienced racism in this university or city? i have heard good a bad things about the city. i have one african friend who went a year ago and he went thru some unconfortable situations. he spoke his native language a couple of time and he would get comments for this. also, is spanish popular in warsaw, or is english more common to hear?

thanks for all the info you can provide.