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Adai (also Adaizan, Adaizi, Adaise, Adahi, Adaes, Adees, Atayos) is an extinct Native American language that was spoken in northwestern Louisiana.

Tenánat Hadéyas
Native to United States
Region Louisiana
Ethnicity Adai people
Extinct 19th century[1]
Language codes
ISO 639-3 xad
Glottolog adai1235[2]
Linguasphere 64-BCA-a
Adai lang.png
Pre-contact distribution of Adai


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.


  1. ^ Adai at MultiTree on the Linguist List
  2. ^ Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Adai". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
  • Campbell, Lyle. (1997). American Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN 978-0-19-509427-5
  • Mithun, Marianne. (1999). The languages of Native North America. Cambridge: Cambridge University Press. ISBN 0-521-23228-7 (hbk); ISBN 0-521-29875-X.

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