More likely, people speaking different dialects will adopt a standard register to communicate with each other. For example, I have seen Himachali speakers from

More likely, people speaking different dialects will adopt a standard register to communicate with each other. For example, I have seen Himachali speakers from neighbouring districts communicate with each other exclusively using Khariboli Hindi, rather than their native Himachali dialects. This is probably true of most large, diverse languages. Each dialect has drifted sufficiently far from each other than while it is possible to communicate with other dialects, it's most convenient to use the shared formalized standard register. So while a Malvani speaker can largely comprehend the dialect of somebody from Gadchiroli, more often both speakers will switch to the standard Marathi register they learnt in school.