Our kids went to Chinese language schools a long time ago in Chelmsford and there are a fair number of these schools outside of Boston. Boston, of course, has a Chinatown and your MIL may be interested in visiting. My experience has been that people visiting here have been more interested in seeing and experiencing the area rather than talking to other Chinese - even with the language issue. My wife speaks several dialects and my son speaks Mandarin and I just keep one close if I go to a country where the main language is Chinese.