I'd like to be inserted into this category since I'm a user and Brazilian. Andre G. Dias (talk) 11:55, January 17, 2014 (Brazil)

For other users who have the same query:

Nick O'Demus answered to me:

You can add yourself to the category in either of two ways:

  1. On your userpage, add the text: [[Category:Brazilian users]]
  2. On your userpage, add the userbox text: {{User Brazil}}

Andre G. Dias (talk) 17:41, January 17, 2014 (Brazil)