We know that marginalia written in a specific language were not necessarily written in a location were that language was spoken. An Italian person might be in Spain and write something in Italian. Or a Greek might be in Greece and write something in his second language.
But if we ignore this possibility and just for fun pretend that languages can only be written where they are spoken, then which path would the manuscript have traveled?
If I understand correctly, we know it was in Prague and afterwards went to Italy, but nothing else, right?
The month names are on something French-like, but I still don't know from where in France, some say north while others say south.
For the earliest marginalia, we have something German-liken although again an area is hard to assign. I think most people will look south instead of north.
So something like this, or can this be refined?