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.
Sikaiana language
The people of Sikaiana speak the Sikaiana language or Central Solomon Pidgin English. After WWII, many people from Sikaiana migrated to Honiara, the capital of the Solomon Islands in search of jobs and education (Donner, 2002). This means that there was a decrease in the use of the language, since Sikaiana was not the language mainly used in that area. A decrease in the advantages of using the Sikaiana language increases the endangerment of it.