Sort:  

Theres not such thing as an EU-citizenship, you get a citizenship in the individual country you want to live in (germany, france, netherlands, poland...). Each of them has a different set of rules.

What @mnemonic19 said is the more technically correct way of explaining it. I got Irish citizenship through my grandparents. Each country has their own system of naturalization, so you'd have to look up the rules per country.

I was considering Spain or Germany but have shifted to Argentina. With the changes here in America, I need a second passport.

I wish I had more DNA diversity to do that! I should have tried harder on that EU residency permit when I was living in Amsterdam. :P