Regarding Praxiteles...
I notice that he doesn't have Latin at all. I assume that this is on purpose? He does have both French 4 and High German 2, so communication will be possible, if a bit difficult sometimes. Council meetings will be... interesting. 
This will severely crimp his ability to study from the library.
I assume that any book he contributes to the library will be in Greek? Good thing that we have a Latin-Greek translator (Eberhard), although he will need to be taught Magic Theory first. 