One reason is that there's a variety of research showing that learning a foreign language is one of the few practices that can increase your intelligence and de

One reason is that there's a variety of research showing that learning a foreign language is one of the few practices that can increase your intelligence and delay dementia. Another reason would be to have an experience that is a basic part of our human heritage. Never speaking a foreign language would be kind of like never dancing. Sure it's not necessary, maybe it won't make you money and not everyone will get into it to the same degree, but do you really want to die without having at least explored life a bit more?