Works of both Indian and European Scholars bear testimonies to the existence of Bishnupriya Manipuri in Manipur in the earliest time.
The “Khumal Purana” Of Pandit Navakhendra Singh refers to the existence of Bishnupriya Manipuri language in Manipur during the reign of Garib Nawaj. Pandit Navakhendra states – ” The main stream of Manipuri, the Aryan origin people, the khumal, Moirang, Angam and Luwang who are following the Vedic cult from the epic ages being the devotees of Lord Vishnu distinguish themselves from the Meitheis”. The language originated and developed in Manipur and was originally confined to the surroundings of the Loktak Lake.
Other authorities such as An account of the valley of Manipore by Col. McCullock, Descriptive Ethnology of Bengal by E. T. Dalton and the Linguistic Survey of India by George Abraham Grierson mention that the language was in existence in Manipur before the 19th century. Dr. Grierson calls the language as “Bishnupuriya Manipuri”, while some other writers call it simply “Bishnupriya”. The principal localities where this language was spoken are now known as Heirok, Mayang Yamphal, Bishnupur, Khunan, Ningthankhong, Ngaikhong, Thamnapoxpi.