Navajo (Diné Bizaad) is a Southern Athabaskan language and the most-spoken Native American language north of Mexico, with around 170,000 speakers concentrated in the Navajo Nation — the largest indigenous reservation in the United States, covering parts of Arizona, New Mexico, and Utah. Navajo gained national attention as the basis for the World War II Navajo code-talkers programme. Our Navajo translation work is occasional and typically cultural, educational, or tied to tribal-government documents.