Conversely, the opposite happens as well, where people have higher mutual intelligibility of different language families than other dialects within their own la

Conversely, the opposite happens as well, where people have higher mutual intelligibility of different language families than other dialects within their own language. I've heard of this in places like India, where "Hindi" is a standard language of a massive dialect chain that is spoken next to various Dravidian languages. A Hindi speaker might be better able to understand a Dravidian speaker from the same city than a Hindi speaker from a distant city.