Caddo is the only surviving Southern Caddoan language of the Caddo language family. It is spoken by the Caddo Nation of Oklahoma. By 2009, there remained only 25 Caddo speakers who acquired the language as infants or children in a non-academic context, and none of these speakers spoke only Caddo, which situation made Caddo a critically endangered language. Caddo has several mutually intelligible dialects; some of the more prominent dialects include Kadohadacho, Hasinai, Hainai, Natchitoches, and Yatasi. Today, the most commonly used dialects are Hasinai and Hainai. Caddo is linguistically related to the members of the Northern Caddoan language family; these include the Pawnee-Kitsai (Keechi) languages (Arikara, Kitsai, and Pawnee) and the Wichita language. Kitsai is now extinct, and Pawnee