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something i think is really neat is that you can kind of determine where a language originated by looking at where the dialects are most diverse
like in the US and the UK we both speak varieties of English, but whereas you may find very similar dialects across broad regions of the US, you may get cases in the UK where two towns less than twenty miles apart can barely understand each other
-F
this method has been used in a number of attempts to pin down where language families originated, but that's generally Pretty Hard due to the sheer amount of additional influences over thousands of years
-F