One of 3M’s acquaintances was once posted in Siliguri (West Bengal) and his wife faced a similar problem. But by the time they shifted back to Mumbai in 3 years, she was not only conversant in Bengali but also learnt Rabindra Sangeet. That is called “assimilation”!
When a person migrates, he weighs the pluses and minuses before taking the leap. Adjusting to local language/ culture is part of the migrant’s life. And this happens all over the world. Expecting the locals to adjust to the migrants… it happens only in Maharashtra!