If your Spanish is truly rudimentary or nonexistent, I suggest you use the Google translate to at least write something down for the receptionist along the lines of "I need to see X type of doctor (x=orthopedics, oncologist, whatever), that speaks English." Unless you get a specific Doctor's name in which case write that down.
I have heard very good things about Otamendi as well, but it sounds like you are looking for a consult. It might help, without revealing too much, asking on the board for which specialty you are looking for, or general practitioner. I am sure someone on the board has a "great doctor" to direct you to.
Personally, we have experience with Mater Dei (it's a private hospital). reception in Emergency did not speak English, but they got us a resident Doc that did and she was great. Pediatrics though so not sure if that helps.