You'll find it very hard to get a job teaching English in either France or Spain. The language assistants within state schools are usually British or American university students, who spend a year of their degree course working in a French or Spanish school.
There are plenty of independent language schools teaching English but there is a great deal of competition to work in them and a TEFL certificate would be an essential requirement for most of them. (Also, they would normally have a minimum contract period of at least 6 months).
Sorry!
Chris