Aztec,
Ok, let's see, for example, over here, in the regular English speaking radio, we play songs made by US artists and also by artists from other English speaking countries. We don't play songs in Spanish or Portuguese. We have special radio stations for these. But if you tune into a radio station from these countries, I would say, 75 % of the songs they play are in a language they don't comprehend, English. They love it. Try it for yourself. Find a web radio from these countries.
Now I don't think that these countries lack artists. No way. They just are fascinated with our culture. Go figure.