Nah, English is like baby's first language. It's one of the easiest to learn, there's nothing particularly complex in it, just the frequent homonyms can get confusing. That's the same in many languages though.
Not to mention the ubiquity of English in music/film/pop culture. My girlfriend learned a lot of English by singing along to rock music as a kid.
English grammar is simplistic. It makes up for it with an utter lack of pronunciation rules.