When foreign people speak English, i've yet to hear anyone (including the Peruvian guide in the video) speak it with anything other than their native accent - feigning the accent of the race/culture of the language being spoken is a strange affectation - if the Peruvian guy in the video had adopted a comedy English accent to speak English it would have been a curious sight. Anyone might speak other languages with degrees of fluency, but they don't speak them natively.