Eh, not bent out of shape, but interested in sparking a conversation.
I have no issue whatsoever with Spanish-only on a domestic South American flight. Frankly, it makes sense - Ecuador is surrounded completely by Spanish speaking countries, and Spanish is the second or third most spoken language in the world. Safety cards are produced either in multiple languages or with images sufficient in detail to render language unnecessary.
Americans can be egregiously insensitive to foreign language issues - something that happens frequently on domestic flights. Can't tell you how many times I've had to translate flight announcements for a neighbor on a domestic flight to Miami (which often have a large minority of monolingual Spanish speakers).