Although traditionally classified as part of the South Bird's Head family, it is classified by Glottolog 4.0 as an independent language family.
Noting low cognacy rates, Holton and Klamer (2018) tentatively consider Inanwatan–Duriankere, as well as Konda–Yahadian and the Nuclear South Bird's Head family to each be independent language families until further evidence can be demonstrated.
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Inanwatan". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
^Holton, Gary; Klamer, Marian (2018). "The Papuan languages of East Nusantara and the Bird's Head". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. 4. Berlin: De Gruyter Mouton. pp. 569–640. ISBN978-3-11-028642-7.