Nambikwara language

Nambikwara (also called Nambiquara and Southern Nambiquara, to distinguish it from Mamaindê) is an indigenous language spoken by the Nambikwara, who reside on federal reserves covering approximately 50,000 square kilometres of land in Mato Grosso and neighbouring parts of Rondonia in Brazil. Due to the fact that the Nambikwara language has such a high proportion of speakers (and, one can infer, a high rate of transmission), and the fact that the community has a positive attitude towards the language, it is not considered to be endangered despite the fact that its speakers constitute a small minority of the Brazilian population. For these reasons, UNESCO instead classifies Nambikwara as vulnerable.