The Navajo language (Navajo: "Diné Bizaad") is a Southern Athabaskan language that is spoken in the United States, specifically in the Navajo Nation (in the states of Arizona, New Mexico, and Utah). It is the most widely spoken Native American language in the US and the most spoken Indigenous language in the Americas north of the US-Mexico border. In 2011, almost 170,000 Americans spoke Navajo at home. Navajo is famous for being used by the Navajo Code Talkers during World War II. 