I'm a complete newbie with Fantasy Grounds, didn't even purchased it yet, I'm using the DEMO version so I don't know if that's a problem. But, I updated the Brazilian Portuguese CoreRPG Ruleset that Nibelung have done to the version 3.3.5, which is the version that I'm using in the DEMO.
I also fixed every special character reference and used a unicode character entity reference so it works better inside FG.
And I also translated the 5E DnD Ruleset to Brazilian Portuguese, but I can't really test it.
CoreRPG: Attachment 23559
5E DnD: Attachment 23560