I guess it isn't that surprising. Both constructed languages and natural languages are man-made and do the same thing, it's just that they were developed by dif

I guess it isn't that surprising. Both constructed languages and natural languages are man-made and do the same thing, it's just that they were developed by different processes. Conlangs also tend to be based, consciously or subconsciously, on existing natural languages. As I understand, Esperanto is largely Romance language vocabulary with Slavic language grammar.