Siouan languages
Siouan or Siouan–Catawban is a language family of North America that is located primarily in the Great Plains, Ohio and Mississippi valleys and southeastern North America with a few other languages in the east.
Saisiyat language
The language area of Saisiyat is small, situated in the northwest of the country between the Hakka Chinese and Atayal regions in the mountains (Wufeng, Hsinchu; Nanchuang and Shitan, Miaoli).
There are two main dialects: Ta'ai (North Saisiyat) and Tungho (South Saisiyat). Ta'ai is spoken in Miao-Li and Tungho is spoken in Hsinchu.
Kulon, an extinct Formosan language, is closely related to Saisiyat but is considered by Taiwanese linguist Paul Jen-kuei Li to be a separate language.