This is an New York Times article from April 29, 2010 on a CUNY effort to record endangered languages with speakers who have settled in New York city.
New York and other large cities have long welcomed immigrants from different communities who often form their own neighborhoods. The same is true for speakers from many endangered languages who may be forced to leave their native lands either due to poverty or political oppression. According to the article, some languages now have more speakers living in New York than in the original homeland.
The City University of New York (CUNY) is now organizing an effort to document some of these languages. Amazing how we’ve managed to overlook this amazing resources all these decades.