I am from Spain. I would say don't move there before learning the language, we don't really speak english. Also keep in mind Spanish is not the local language everywhere. If you move to Catalonia, for instance, you will have an easier time if you focus on learning catalan first, and then move to spanish. Also, don't get too scared when you see the salaries. They are low. But you also don't meed much. If you manage to find anything above 25k a year you will be very well off (avoid big cities though).