This is utter rubbish. Nobody learns to speak any language as an adult without an accent. That has nothing to do with phonological complexity, that's just how we're wired. Spanish may be easy to describe on a blackboard, but don't tell me that people who learn Spanish as a second language later on don't have accents. And languages don't succeed because of linguistics, they succeed because of politics. As someone whos…
> Nobody learns to speak any language as an adult without an accent. Nobody speaks any language without an accent. However, I've managed to convince native Spanish speakers that I was from Spain (later I had trouble convincing them that Spanish was my second language). Most people don't get rid of their foreign sounding accent because they don't work on improving their accent.
Taking on enough of a local accent to be understood is good. Losing your accent is a terrible cost that requires hard work to achieve. Why would you work hard to hurt yourself?
After all, chicks dig an accent.