In Taiwan Hakka people (nomadic Chinese originally from northern china) settled in Taiwan around 350 years ago. They settled Miaoli and Hsinchu (circled in red). Yet despite literally bordering each other and living in walking distance from each other their dialects are now so different they can't speak to each other in Hakka and understand what the other is saying and have to use a third language to converse. Anything like this happens iyc?
Hakkas seem to be the one recurring han subgroup of history. I know Hong Xiuquan was a hakka, i know hakkas made a little chinese state in borneo, but otherwise idk
