Hmm. I'm aware that "speaking like dat" is a caricature, which is why I'm giving my bruiser an added feature (i.e. an interest in rivers and sailing). Quite possibly he was a sailor - perhaps a smuggler? - before he turned to crime.
Mr Tulip has a similar obsession (with art). Of course, I'll need to develop my "bruiser" a little more to match Mr Tulip. So, let's see ... *cracks open bottle of ink*
My bruiser is a Greek smuggler of figs, a delicacy in the ancient world. He was born in Thebes but moved to Chaonia, on the Greek west coast, where he fell in with a bad crowd and started fig-smuggling to eastern Italy, sailing around the wild lands of the Thracians and Illyrians (today's Albania). Inevitably, some sycophant told on him (in ancient Greece, importing figs was a crime against the state, so someone who snitched on a fig smuggler was known - literally - as "sycophant), so our bruiser thought it best to leave and sail to Italy. Junius, the local crime bigwig whose underlings accepted the figs, welcomed our bruiser with open arms, and said bruiser served Junius faithfully until (and even after) they were caught and imprisoned.
My bruiser is, obviously, large but rather simple. He knows what he likes (very few things) and who he's obliged to (Junius). His role, which he's happy with, is to act as muscle.
As a former sailor, he naturally worships Poseidon and has a small copper wristband of a merman on his left wrist.
How does that sound?
This guy is a very minor character, so I think I've got more than enough details on him!
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As for Latin, I'm hoping to stay away from it unless it either serves the story or fairly easy to understand. (That is, I'm not doing Latin just to be a show-off, e.g. "Look at how much Latin I know"). No audience likes that, right?