I'm guessing this may be difficult/impossible to implement, but have you looked into adding back EK2's functionality to promote other cultures where you have high acceptance?

Does anyone know if this is compatible with ULTIMATE Elder Kings?

I would not run this mod with multiplayer. It doesn't overwrite many of the vanilla keys that the original mod uses, resulting in many many errors, and likely many desyncs. Credit to the author for speaking against the EK2 dev team, bunch of freaks running that mod.

With this mod, at which point culture is considered dead? Still when there is no majority in any country at the map?

This is awesome, thank you.

Alright got it, thanks.

@AdanaCityPlayboy It'll "work", but you'll break dozens of events, decisions and other things in EK2 because of what it overwrites.

So i just used it without a submod at all before, and it worked still