Western Siouan languages
The Western Siouan languages, also called Siouan proper or simply Siouan, are a large language family native to North America. They are closely related to the Catawban languages, sometimes called Eastern Siouan, and together with them constitute the Siouan (Siouan–Catawban) language family.
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.