Both Marathi and Konkani have to be granted official language status and not just one of them. both these languages are interlinked. Konkani itself is derived from Marathi language.
Marathi was the official language in Goa since the Kadamba and Vijaynagar rulers,while konkani was the spoken language .thus both have co-existed since the last 1500 years. Marathi was used extensively for oral as well as written communication while Konkani was spoken and not written until recently.65% of goan people consider themselves marathi speaking while 30% konkani speaking. both are now being reduced to a minority in goa due to outward migration of goan people to mumbai , gulf and inward migration of non-goans from karnataka , UP , Bihar etc.
so marathi and konkani has to stand united for their mutual welfare.