I've been in the opposite position before, and therefore I am a huge fan of having it in as many languages as they are capable of.

I was flying LAM Mozambique a few years back, on a regional flight, in a plane I wasn't familiar with. All the safety instructions and inboard announcements were in Portuguese only, and so were the flight safety cards.

We're so used to hearing it in English that I'd hard to appreciate how disorienting (and frankly, a little scary) it is to have absolutely no idea of what's going on. I can only imagine how bad it would be in an emergency.