I am playing in the earlier centuries on this mod for the first time and I am learning about the Barbarian Migration.

I was wondering if this plan I have could make it work so that I never have to lose my old land.

What if I:

Culture convert the ones with Pomeranian, Hanoverian, etc. Culture

Only border Rome, West Rome, Byzantium and/or Gallia

AND I'm the only Barbarian Tribe on Earth.

Would that prevent it?