Is this for desktop Photoshop or Photoshop Touch?
If the former:
Photoshop (on Mac) or Edit (on PC) > Preferences > Interface > UI Language.
I'm not sure about the latter because I haven't seen such a setting.
Este Photoshop esta no tablet, é o Adobe Photoshop Touch para android, não tem esta opção de mudança de linguagem.
OK, based on my research, if you go into Settings in Android > Language & Input and then set it to Portuguese you should be all set.