Integration/ Assimilation issue.

[Hatethese]

I integrated the Lepontic culture because I wanted to get the Italo-Celtic influence tradition.However, in territories I controlled prior to the integration pops are still being assimilated. is there any way to reverse this?

 

[Stars_and_Bars]

No, there is not.

 

[Hatethese]

So then I would have had to integrate them as soon as I had a few in my domain?

 

[Stars_and_Bars]

So then I would have had to integrate them as soon as I had a few in my domain?

If you want to maximize their numbers. They will still grow naturally. For every pop that's currently being assimilating because you conquered them, there's another pop that's growing and that's basically guaranteed to be their culture. Min-maxing is never the easy route.