Do not know what I want, Pt or Br is the same to me is I do not know how to change the language in the settings menu, I do not see this option.
There is no option to change the language in start8 however it detects your language automatically . if your windows system language is English it can not show the Portuguese Languages, but you can name the Portuguese language file to en.lng ... and name the en.lng file to any other name before that ... In that way you can see and test the translation. and if your windows system Language any other language just name the corresponding file according to your local language.