Tags: Language.
Adai (also Adaizan Adaizi Adaise Adahi Adaes Adees Atayos) is an extinct language that was spoken in northwestern Louisiana. It is very poorly documented being known only from a list of 275 words from 1804 so classification is probably impossible. It was once proposed that there may be a connection between Adai and the nearby Caddoan languages but this now seems unlikely.