Whats my native language?

Okay so my family is really weird. I live in Argentina and my Dad lives in England. I speak Spanish with my mom, Spanish/english with my sister and Dutch with my dad. My parents speak french with eachother. It's SO annoying because we always have to translate everything. My first word was 'mama' which is "mom" in spanish. I've always gone to English speaking schools. I was born in Holland, then we moved to Egypt and then to Nigeria (We had to move a lot because of my dad's work) th we moved to Venezuela and now we're living in Argentina. I just feel so weird.. I can speak 4 languages and I consider them all my native language.