Siouan languages
Siouan languages can be grouped into the Western Siouan languages and Catawban languages. The Western Siouan languages can be divided into Missouri River languages (such as Crow and Hidatsa), Mandan, Mississippi River languages (such as Dakotan, Chiwere-Winnebago, and Dhegihan languages), and Ohio Valley Siouan branches. The Catawban languages consist only of Catawban and Woccon.
Ta’Oi language
Ta’Oi (Ta’Oih, Ta Oi) is a Katuic dialect chain of Salavan and Sekong provinces in Laos, and in Thừa Thiên-Huế province in Vietnam (Sidwell 2005:12).