I want to teach in college or high school in republic Ireland or in Spain what education qualification needed?

i am from India i would love to explore my teaching skills out of my comfort zone(my country) and learn about different ways of teaching and understanding students, right now I am studying in my final year of bachelor in science(Zoology) and then i'll be doing my masters and then would love to have bachelor of education degree what are the other requirement if i want to teach in different countries like republic Ireland or in Spain?????? help