Consider this sentence:
Who founded the Academy circa/around 387 BC?
Is "circa" the best word to write, or is it "around"?
Or does there exist another word that is more appropriate?
Consider this sentence:
Who founded the Academy circa/around 387 BC?
Is "circa" the best word to write, or is it "around"?
Or does there exist another word that is more appropriate?
Circa is Latin, around is English. Latin words falute higher than English ones.
So the decision is yours. Are you going to maintain an elevated scholarly tone throughout? Consistency is part of that; once you elevate your prose, readers are more likely to notice when you fail to maintain it than if you're more informal.
Who are your readers and how do you want them to react? That's always the first question. An answer to that will determine many other things about what you write.
EDIT: It occurs to me ex post posting that in the case of the Academy, circa can only be a mark of high falution, because the Academy was founded in Greece, and never used Latin.