Connecticut, Poughkeepsie, and many, many other place names in the US are not English at all; they're names/words from various indigenous American languages. I

Connecticut, Poughkeepsie, and many, many other place names in the US are not English at all; they're names/words from various indigenous American languages. It's not fair to count these "against" American English, are there are good logical reasons to just use the established place names that the locals are already using, rather than worsening things by making up your own parallel set of place names.