4/10 (The translation is fine; the game underneath is not).
If you speak any English or Spanish, play the original US/EU version. If you must have Portuguese menus, this patch works, but gran turismo psp iso pt-br
Since this game was never officially localized into Brazilian Portuguese by Sony (the official version only had menus in English, French, German, Spanish, and Japanese), any "PT-BR" ISO circulating online is a . 4/10 (The translation is fine; the game underneath is not)