Kumeyaay is a Hokan language of Mexico and Southern California.
In the United States the language and people are generally spelled 'Kumeyaay' and were formerly known as 'Diegueno'
(the so-called "Mission Indians" of Southern California used to be identified by the name of the nearest
Catholic mission), while in Mexico, the language and people are spelled Kumiai and are sometimes referred to as Tipai, Ipai, or, confusingly,
Cochimi. (The actual Cochimi language has been extinct since the 1800's,
but non-native Mexicans have confused the two groups for centuries.) Today Kumiai is spoken by about 300 people on both sides of the
Mexican-US border.