@Dukkokun [ITA] Sorry for the late reply, it slipped my mind. I'll think about it, but as it stands this mod is just for my own use and for that I currently only want Earth humans.

It's very easy to make a mod like this though, since it involves little more than copying some text files for prescripted countries and deleting all the entries for non-human empires. So I'd suggest just doing it yourself by looking up one of the many guides or wiki on Stellaris modding and making one yourself for your own use. Best of luck either way!

Could you make a version that keeps both Human empires?

@Rootiga No, this only replaces the pre-scripted vanilla empires. I think your issue might be solved by setting your own custom human empires to always spawn?

so does this remove the randomly generated countries? because no matter what I do they still spawn and replace my custom human empires

Interesting, so the point is "You never know what to expect"

Except Earth...