I´m wondering... is it possible to teach English in Argentin...

Because many teachers have signed contracts and not shown up in these particular countries, I recommend going to the country and presenting yourself and experience. They may offer you a course in TESOL or TEFL and then hire you, or hire you without it because not many people go there on spec. Good luck!

Hi, I lived in Argentina for two years, from 2005 to 2007. I think that there are opportunities in Buenos Aires, and I am not sure, but think I remember that they may not require an EFL/ESL certificate. Outside of Buenos Aires, even in provincial capitals with substantial population, the job market is much more difficult. I have a relevant Master´s degree and 18 years experience and no language school in the provinces would hire me! IMHO, there are better places to go for a ESL teacher than Argentina. Hope this helps.

I know in some parts of Chile, you don´t need a certificate. A bachelors in anything is a must though. Try Concepcion since it holds many universities and schools. It´s heavy in education and I´m positive you would be able to find work there, although the work may not pay the bills entirely.