Professor Bruce Mannheim is quoted in a Wall Street Journal article entitled, "Reviving a fading language called Quechua” -

"Several factors, including discrimination, have contributed to the decline of Quechua, particularly in urban areas, said Bruce Mannheim, professor of anthropology at the University of Michigan.

"Quechua speakers in urban areas make sure their children speak Spanish," he said. "And their grandchildren only speak Spanish.…Among the different languages, there are a number of them that are threatened with extinction within this generation.""

http://record.umich.edu/newsletters/051414

http://online.wsj.com/news/articles/SB10001424052702304431104579547700242495112