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.
Sika language
The Sika or Sikanese language is a member of the Central Malayo-Polynesian branch of the Austronesian language family, and is spoken by around 180,000 people of the Sika ethnic group on Flores island in East Nusa Tenggara province, Indonesia. It is notable for being one of the few languages which contain a non-allophonic labiodental flap. It shows evidence of having a Papuan (non-Austronesian) substratum.