Why there should only be economic reasons to evaluate benefits of learning foreign languages? It's just natural for people who want to learn more about surrounding reality to study foreign language. Too easy. If they think it will help their children or themselves then even better. http://qz.com/148253/its-ok-if-your-kid-isnt-fluent-in-chinese-yet-thats-the-bottom-line-of-new-research-from-larry-summers/