Currently all links end up on the Portuguese language booking page. ended up booking via Expedia - it cost £20 extra but at least i think I understood what I've purchased. Not too many other options to get from MVD-GRU that don't involve Miami
Booked a return but I only need the outbound (it was lots cheaper) - Expedia assure me I can cancel the inbound for a $70 penalty - should be lots of fun trying.....