Vlashki, Garifuna, Mamuju and the Other 797 Languages New Yorkers Speak 2.27K Max Read 04/29/10 12:17AM Filed to: Communication Communication Language linguistics Vlashki garifuna Mamuju New York City New York City, the "capital of language density in the world," may be home to as many as 800 languages—some of which will be extinct in 20 years. And you thought you were impressive for knowing French. [Photo]