Like Quinn, I interviewed at TGH. Like Quinn, I liked the place a lot, and ranked it high (#2). Unlike Quinn, I didn't match there.
Irrespective of that, I was very impressed with the physical plant, and the vast services available there.
As far as speaking Spanish, they told me that it's about 10 or 15%, and mostly migrant workers from the Dominican Republic. The Hispanic population is a lower percentage than that which I have now in Queens, NY.
My own, biased personal opinion from experience is that people willing to work as migrant workers do their best to learn English (even if that isn't very effective), and appreciate attempts to learn Spanish (even with my fractured abuse of the language - I spend many days in fear of the Language Police coming and arresting me for murder of a sovereign tongue).
Uh oh...here comes my soapbox...
I see quite an honor in those people willing to work so hard for something other people won't do, even in the face of those that might look down on them for being poor, and insult them in a language they don't know. These are the people that are easiest to marginalize, and, as such, are easiest to "blow off" - and, because of that, they are why I am in EM. These people deserve the best I've got, because, if I start NOT giving them my best, where does it stop?