I'm bilingual portuguese/english, and two completely different personalities. I have a really hard time flirting in english, for instance, when in portuguese it's very easy. Also I always write perfectly in portuguese very rarely mispelling a word, whereas I'm a full blown dislexic in english. I think it only shows how much language is the code of learning.. I learned to read and write both in E|P at the same time, and spoke english daily for 2 years as a child in Africa, but after that I went back to speaking only portuguese in Brazil, and having english mostly for the sole purpose of entertainment. Another notable differences I could notice is that with English I have a much more flexible accent, which can easily vary after spending a few days speaking it on travels.