What is Navajo?
Navajo (known as Dené Bizaad in Navajo) is spoken by the Navajo people in the Navajo nation, located in North-East Arizona/North-West New Mexico, USA. With 170,000 speakers, it is the most widely spoken Native American language in the US. It is a member of the Southern Athabaskan branch of the Na-Dené language family, one of the largest in the Americas, spoken by the descendants of the second great human migration into the Americas.
Navajo is a language spoken by the Navajo people in America, mostly in the Navajo Nation reservation. It's a tonal language with agglutinative grammar. https://www.omniglot.com/writing/navajo.htm
They actually made a Finding Nemo dub in Navajo. If you're curious about what it sounds like, here's a clip from the movie: https://www.youtube.com/watch?v=8wuJ0P-cuow