Brazilian Portuguese.
Funnily enough, it took me a while to determine it was definitely Brazilian Portuguese, given I'm a native Portuguese speaker, because the whole thing is written in a stiff academic-ish style that hides some the differences between European and Brazilian Portuguese.
I grew up in Spain close to the border with Portugal, so even though I don't speak the language (something which I really regret) I am familiar with it. What are the major differences between European and Brazilian Portuguese? I only know that Brazilians use the gerund like us Spanish speakers, whereas European Portuguese uses "estar a" + infinitive.