Hello, sorry for butting in.
If you’re interested in seeing Brazil added to the game, there’s a mod that takes all the revolutions and turns them into playable civilizations. It’s called Fully Playable Revolutions and is currently the only mod that brings Brazil as a playable civilization. I think this might help you shorten the wait for a modder to bring it as something of higher quality.
I recommend being patient, since the “leader” of the Age of the World project theoretically plans to eventually add Latin American civilizations, and I seem to recall Brazil is one of the favorites, so it will be added at some point.
Alternatively, I seem to recall that part of the team behind this mod (World Expo) wants to add more civilizations, which I believe also includes Brazil, but for obvious reasons, they need to first finish what they’ve already started and receive support to expand the project.
My personal advice is to wait for Age of the World to make the Brazilian civilization and use the Fully Playable Revolutions mod to make the wait easier.