The Khas Malla State was expanded from Nuwakot in the east, Kedar in the west, Tibet in the north, Terai terrain in the south. The entry point of the state was the Mallawar of Kailai Kanchanpur.
There were some parts of Tibet which were influenced by this state. The Khas empire spread to Garhwal in the West, from Kumaun to East till Gorkha in the East was a large realm of Nepal. Sinja Valley was the capital of Khas State.
Nagraj, who came from the Gulf Territory of Tibet established a sovereign state of Khas in Karnali region. This time, the 12th century (1150 AD) is estimated. The history of that area can be obtained from source records such as Tibetan genealogy, Dullu archives of B.S. 1414 along with genealogy of Gopal Raaj.
The lords of this state were Nagraj, Krachalla, Ashok Challa, Jitari Malla, Ripu Malla, Aditya Malla, Punya Malla and Prithvi Malla, etc. The state’s existence was around 226 years.
After the collapse of the Khas state, 22-states (Baisee Rajya) like Bajhang, Doti, Jajarkot, etc. have been born in the far west. At present, the most undeveloped and backward area was the dominant state of the medieval state.
The main and significant contribution of the Western Khas state is the contribution of language. The origin of present Nepali language is from the Khas Malla state. So this language is also called ‘Khaskura’ or ‘Sinjali Language’.
The Khas Malla kings made this a national language by using in royal works. And because of this, the language continued to grow, modified and developed regularly.
This language was widely used in 22-states (Baise Rajya) and 24-states (Chaubise Rajya) which stood after the dissolution of the Khas Malla state.
This language got a place of the royal language in all the 22/24 states and after the reunification of greater Nepal, it became the national language of Nepal.