What language does anasazi people speak?

The people in the Navajo tribe speak Navajo, Diné bizaad,

which is in the Southern Athabaskan language family. It is the most widely spoken native language in the US by about 175,000-200,000 people. About 2.9% are monolingual in Navajo.

They also helped us win ww2 in the Pacific by creating a fast and accurate code to communicate over open radiOS using Navajo as it's base .