Spelling not working with portuguese languange

Hi,
After installing Scrivener and run it, automatically it reconize my system language (Pt-br) and settings de interface language to portuguese as well.
But, when I starting a text, the spelling is working with english language, I change from options the choice for use language of system to portuguese language itself, Restart again, but the spelling works only in english for me.
Anything wrong? My mistake?

Thanks,

Hi Vanheber,

While the interface language for Scrivener was able to pick up your system language, the spellcheck dictionary does not. What you want to do is go to File > Options > Corrections. There you should see a setting for Dictionary. You may need to click on the download button next to it and download the correct portuguese dictionary. Select that as your dictionary and spellcheck should work better for you.