
Re: What qualifications do I need to teach English in Argentina/Chile?
No, you wouldn't be wasting your time. The best way to find a job there is to just go, then find one when you're there.
I imagine that it would be much the same in Argentina and Chile as it is here in Thailand. Officially you're supposed to hold a teaching degree or an unrelated degree and an ESL/EFL cert. like you have to get a job in Thailand, but the reality is very different. Even back-packers with no qualifications what so ever still manage to land themselves teaching jobs in Thailand.
Just go, and have a good time while you're there!