Kaure and
Kosare (Kosadle) are clearly related. There is a history of classifying them with the
Kapori–Sause languages. However, Kapori and Sause show no particular connection to the Kaure languages, and may be closer to
Kwerba. Foley (2018) considers a connection with
Trans-New Guinea to be promising, but tentatively leaves Kaure-Kosare out as an independent language family pending further evidence. ==Proto-language==