Assam is a multilingual state where various Aryan and Non-Aryan lingual families
have been living. There is reciprocal influence between Assamese and other languages. The
Non-Aryan lingual families usually belong to Sino-Tibetan, Austric, Dravidian etc. Most of
the languages belong to these families have extincted from the scene. Assamese turns to be
the mother tongue of the tribes whose language was died as they adopt Assamese as their
second language. The imposition of Assamese culture and language brings uncertainty to the
Non -Aryan languages. Unawareness of the people regarding language also contributes to it.
The objective of the paper is to study the dead languages and its reasons in the context of