Analysis of information sources in references of the Wikipedia article "Origin of the Rashtrakutas" in English language version.
In the Kavirajamarga (A.D. 850) the Kanarese country is described as extending from the Kaveri to the Godavari; which shows that the linguistic area at that time extended further north than at present. Inscriptions, manuscripts, local names and other evidence prove that Kolhapur, where the chief language now is Marathi, was once in the Kanarese area. Also in Sholapur town and district there are many Kanarese inscriptions. The northern limits of Kanarese were probably pushed back by the Maratha raids and conquests.
In the Kavirajamarga (A.D. 850) the Kanarese country is described as extending from the Kaveri to the Godavari; which shows that the linguistic area at that time extended further north than at present. Inscriptions, manuscripts, local names and other evidence prove that Kolhapur, where the chief language now is Marathi, was once in the Kanarese area. Also in Sholapur town and district there are many Kanarese inscriptions. The northern limits of Kanarese were probably pushed back by the Maratha raids and conquests.