A) No, Polish, though I lived in Texas for 17 years so my English is pretty good.
B) I like quite a bit of music in languages I don't speak, or mixtures of English and other languages, or recordings in Caribbean patois which is technically English but nearly incomprehensible. I guess understanding the lyrics is not really that big a deal to me.
C) Sure.
D) As far as rock goes, I'd say the first two Shakira albums count as rock, and I've also listened to some Japanese psychedelic rock and oshare kei, Scandinavian black metal, and Secos e Molhados from Brazil.
Outside of rock, I listen to a lot of reggaeton (Daddy Yankee, Ivy Queen, Don Omar and Franco el Gorila), sertanejo (Michel Teló and Gusttavo Lima had some big hits in this part of Europe), African pop/hip-hop/dancehall (though a lot of it has lyrics partly in English, there's some with lyrics in Portuguese: Dama do Bling, Sara Tavares, Lizha James), various Latin pop (Kat DeLuna, Buraka Som Sistema) and even some Mongolian stuff (Uka, Sonor). I cover many of those as well.