Most of them reside in the northeastern Indian state of Meghalaya where Khasi speakers form a plurality of the population.

Smaller Khasic-speaking pockets are found in Assam, Manipur, Mizoram and Sylhet Division of Bangladesh.

Paul Sidwell (2011) suggests that Khasian is closely related to Palaungic, forming a Khasi–Palaungic branch.

Proto-Khasian morphology includes a causative *pN- prefix and verbalizing *-r- infix (Sidwell 2018: 66-67).

The following reconstructed paradigmatic and closed class morphemes in Proto-Khasian are from Sidwell (2018: 51-67).