Replying to Working in South America

Whilst I realise most of NS may not be able to help me, I remember that there are some Chilean nsers, and maybe some of the SAS campers might have an idea as well. And yes I would have put it in regionals, but there doesn't appear to be a SA one!

Anyway, I quite want to go instruct in South America next summer, but I don't really speak Spanish that well. Any ideas how much of a problem this is? I hear there are quite a few English speaking lessons too. I will probably go to Central America for a few months first, so my Spanish should be good by the time I get there, but I need to get a job earlier than that. 

Anyone worked down there or got any ideas?

Cheers