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.
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.