Koasati or Coushatta is a Muskogean language spoken in Allen
Parish, north of Elton in Louisiana, and near Livingston in Texas.
The exact number of speakers is uncertain, but officials of the
Coushatta tribe believe that the majority of tribal members over
20 speak Koasati.
In 2007 a program to revitalize the Koasati language was started
by the Coushatta Tribe of Louisiana in collaboration with McNeese
State University in Louisiana and the College of William and Mary
The closest languages to Koasati are Mikasuki and Alabama,
and there is apparently considerable mutually intelligibility
between Koasati and Mikasuki, though not with Alabama.