All humans share same vocal cords, breathing and tongue and mouth shape. For there you can derive some amount of sounds that travel reasonably well in air. I w

All humans share same vocal cords, breathing and tongue and mouth shape. For there you can derive some amount of sounds that travel reasonably well in air. I would expect most of these sounds to follow similar rules. Sometimes there might be something like clicks, but in general similar sounds will be used. And certain styles will probably cluster as well. In the end you have handful of options and thousands of languages. So some must end up being similar.