Flag Color Change

[Alexivan]

There's a change_country_flag effect which you could use

 

[Alexivan]

On a similar note, is there a way to change a country's name after it's been created? I tried various "set_name" uses but couldn't get it quite right...

set_name effect should work

 

[Alexivan]

Can i change country name by event?

People could make mods with events which can change

Try this and nothing happened.

country_event = {
    id = population_improved_ethics_divergence.100
    title = OK
    desc = test
    hide_window = yes
    is_triggered_only = yes
 
    immediate = {
        set_name = "aaa"
    }
}

Yeah, seems like it doesn't work for countries. Will fix for Heinlein