The paper analyses the morphophonology of the present progressive verb form in Kolhapuri Marathi to suggest that it might be an instance of grammaticalization. More specifically, the polysemous verb ‘lagɳe’ (to get hit/attached) seems to express a progressive reading in addition to an inchoative one expressed in the standard variety of Marathi, suggesting that the verb ‘lagɳe’ is likely to have grammaticalized even further in this variety of Marathi.
You can find the paper here.