Kolarian is a word first used by George Campbell for Munda languages.
[1] He described it as one of the three non-Aryan language families of India, which he made up, along with the Tibeto-Burman and the Dravidian.
It is a branch of Austro-asiatic languages spoken in the eastern regions of the subcontinent, and is also known as Munda languages.
[2] Its not a single tribal language but a group of tribal family languages.
The speakers are called Kolarian tribes.