Tour shows information on system language when launching for the first time even if the selected musescore language is different.
1) Open Musescore for the first time
2) Choose a language other than the system's language
3) Follow the Tour
I'm not sure if this is a problem when the system is in portuguese and selecting musescore to be in english. It doesn't happen after resetting the Tour on the Help tab.
First image is how it appeared on the first time launching, second image is how it appeared after resetting the tour.