Angami Naga Sign Language
Naga Hills Sign Language was a village sign language of Nagaland. Early in the 20th century, a high incidence of deafness was observed among communities of the Naga hills. A sign language was used by both deaf and hearing members of the community. Ethnologist and political officer John Henry Hutton wrote:

"As one might expect ... of men without the art of writing, the language of signs has reached a high state of development... To judge how highly developed is this power of communicating by signs, etc., it is necessary only to experience a Naga interpreter's translation of a story or a request told to him in sign language by a dumb man. ...