The Navajo language, known as Diné Bizaad, is a member of the Athabaskan language family. It is primarily spoken by the Navajo people, who are indigenous to the southwestern United States. The language is known for its complex grammar and rich vocabulary, which reflects the culture and environment of the Navajo Nation. Navajo is one of the few Native American languages that is still widely spoken today, with tens of thousands of speakers. Efforts to preserve and promote the language include educational programs and the use of Navajo in media. The language played a significant role during World War II, as Navajo Code Talkers used it to create an unbreakable code for military communications.