I'm interested in making new European leagues by relegation so that the last clubs drop out and move to a lower league - How to do that I would like the clubs to keep their country

This can't be done within FMRTE.  Only the pre-game editor will work for you.

 

In fact, ask this question on the official FM forums.  You will get a better response there, maybe even with a guide on how to do it.

It is certainly doable you would need some knowledge of advanced rules and be prepared for some  trial and error

 

As a heads up in continental squad selection rules this is still very buggy via fixture index rules

but you can get around it by setting up match day rules not ideal but I can confirm they do work

 

As greyfox says though ask over at SI

Will close this thread