I can't comment on workload since you didn't specify which specialty but here's the most important thing you need to know...
Speaking only English will get you nowhere in that place. Last time I was there (2y ago) the signs in the hospital were printed in 6 languages (English, Russian, Cantonese, Spanish, Creole and Hebrew). If you speak 3 or more of these languages you have a decent chance of being able to interact meaningfully w/ 50% of your patients. Not a criticism, just a statement of fact. I'm one of those pathetic Americans who speaks English and about 10 words in 6 other languages (I can get a beer or find a place to take a leak pretty much anywhere in the world) and I can count on 2 hands (w/o thumbs) the number of patients I had in 8 weeks at Maimo as a student that I could have a real conversation with.