First, there was no France, nor a Germany.
France got their name from the Franks.
The core of his empire was central Europe.
...Today he is regarded not only as the founding father of both French and German monarchies, but also as the father of Europe: his empire united most of Western Europe for the first time since the Romans, and the Carolingian renaissance encouraged the formation of a common European identity...
I think describing him and his achievement with todays nation states or nationalities would be flawed at best.
That came much later...
And above all, present time Germany to a greater or lesser extent has Prussian character,
What makes you say so?