I started the translation from the English files and then translated the files following other translations (e.g. header fields). I noticed the files 404.md and CONTRIBUTING.md are not included in other languages, so I didn't include too---let me know if I should include them. I made one commit per change to make it easy to diff from English to Portuguese---let me know if you prefer to have them squashed into a single commit.
I started the translation from the English files and then translated the files following other translations (e.g. header fields). I noticed the files 404.md and CONTRIBUTING.md are not included in other languages, so I didn't include too---let me know if I should include them. I made one commit per change to make it easy to diff from English to Portuguese---let me know if you prefer to have them squashed into a single commit.