Siouan languages
Authors who call the entire family "Siouan" distinguish the two branches as "Western Siouan" and "Eastern Siouan" or as "Siouan-proper" and "Catawban". Others restrict the name "Siouan" to the western branch and use the name "Siouan–Catawban" for the entire family. Generally, however, the name "Siouan" is used without distinction.
Kiowa language
Kiowa or Cáuijògà/Cáuijò:gyà (″language of the Cáuigù (Kiowa)″) is a Tanoan language spoken by the Kiowa Tribe of Oklahoma in primarily Caddo, Kiowa, and Comanche counties. The Kiowa tribal center is located in Carnegie. Like most North American languages, Kiowa is an endangered language.