Salsa
The question of whether or not salsa is anything more than Cuban music has been argued over for more than thirty years. Initially, not much difference could be heard. Later it became clear that salsa in New York was a bit different from popular music in Cuba. Also, Miami, Venezuela, Colombia and other places all had their own ideas. It now seems clear that salsa has receded from the great position it achieved in the late 1970s, at any rate in New York. The reasons for this are also much disputed. It is difficult for any music which uses a foreign language to succeed in the biggest English-speaking market-place.