Prasun (Wasi) is the most aberrant of the Nuristani languages, part of the Indo-Iranian branch of Indo-European languages. It is spoken in the Prasun Valley of the Pech River in northeast Afghanistan.
Prasun (Wasi, Paruni) has long had a reputation for being the most aberrant of the Nuristani group of Indo-European languages. Only after the publication of a considerable number of Prasun texts in 20