Kwatl
Kwatl是科奇米-尤马语系的一种语言，过去分布在墨西哥，现已消亡。
Kumeyaay (Kumiai), more precisely known as Central Diegueño or Campo, is the Native American language spoken by the Kumeyaay people of southern San Diego and Imperial counties in California.
Hinton in 1994 suggested a conservative estimate of 50 native speakers of Kumeyaay.
Kumeyaay belongs to the Yuman language family and to the Delta–California branch of that family. Kumeyaay and its neighbors, ʼIipay to the north and Tiipay to the south, were often considered to be dialects of a single Diegueño language, but the 1990 consensus among linguists seems to be that at least three distinct languages are present within the dialect chain.
摘自英文维基百科 · Kumeyaay language · CC BY-SA 4.0