Who are the characters?
Those that are left behind but weren’t born in Briton
Client State Soldiers
Again those who for whatever reason were left behind
Citizens of Rome who were British by birth the speak a form of Latin that has celtic cognates. This will be the common tongue
P-celts those early britons who have not adopted the British lifestyle there are something like 15 tribes that have very different feelings about the Romans and each other
two maybey three different peoples north of the wall. Very different religion from the rest.
C-Celts bunches of tribes like the picts but with a more celtic view of the world
Big German Guys with bad breath.