The Ao or Central Naga languages are a small family of Sino-Tibetan languages spoken by various Naga peoples of Nagaland in northeast India.
Coupe (2012)[1] considers the Angami–Pochuri languages to be most closely related to Ao as part of a wider Angami–Ao group.
[2] Hsiu (2021) places Makury, Long Phuri, and Para into a Greater Central Naga branch, but excludes Koki (Kokak).
The internal structure of Bruhn's Central Naga group is as follows.
Coupe (2023) suggests that Wui, a recently described divergent language of eastern Nagaland, is likely a divergent Aoic (i.e., Central Naga) language.