What, Franko-Roman? However, with Soissons still intact at start, I think Northern Gaul should remain Romano-Gallic at start. We could make Franko-Roman the direct melting pot of Old Frank and Romano-Gallic, while Frankish + Franko-Roman = French. And Occitain would be Romano-Gallic + Frankish?
What do you mean by Franko-roman ?
Yes Northern Gaul should be Romano-gallic. I only said that frankish influences in the north made the romance people different to their southern cousin less influenced by german.
In game I think the easiest way to do that would be to have some romano-gallic provinces flip to the germanic franks culture to simulate the "germanisation" (not in language tough it will change too but in culture) of the people and then convert the german provinces in de jure Gaul/Francia to Frankish (please not french -_- ). Like Paradox is doing in Charlemagne.
I imagine the event would go something like: "The roman under our rule are abandoning the customs of Rome replacing them with ours. They are now true "insert liege culture" (here Franks).
Those provinces who stayed gallic or were visigothic will flip to occitan instead.
Edit: I guess that event could go like this: The people of "insert province name" have always resisted Frankish (or any other culture I guess) rule and kept fiercely their own customs. Altough we cannot consider them roman anymore. They know should be known as the "Aquitaines" (the medieval name of the occitan, occitan is fine too).
Edit2: So i also read that apparently the feoderati systems was still alive in the eastern roman empire even at the time of reconquest of Italy.
I think it could be like how the varangian guard is simulated in the vanilla and all german could have the event to join (except maybe nicene christian ?) as a feoderati also maybe have more bad event because of that army than the varangian (maybe a higher chance of an adventurer army of a "former" feoderati attaking a part of the roman empire maybe even the estearn roman empire ?).
This mercenary army could be assembled in any "roman" state and also disolved (with consequences ?). It should automatically dissolves at a certain point I guess.