>>If everyone understands English and primarily speaks it, there is no real need, or opportunity, to learn/use a second language. This hits upon the key motiva

>>If everyone understands English and primarily speaks it, there is no real need, or opportunity, to learn/use a second language. This hits upon the key motivating driver (or lack thereof) of language acquisition: multiple languages generally act as a force multipler[1], but aren't as "useful" when considered in isolation. The other problem with language acquisition from a purely utilitarian aspect is the fairly large time commitment which might be better spent elsewhere (e.g. studying core subjects in the resident language). But the paradox of the force multiplier factor is that you ideally want a fairly strong base to amplify in the first case (e.g. Math/Science). Even though people may not break it down this way, this seems to be the intuitive reasoning use by [semi-]multilingual parents, and is often another reason why the "culture/tradition" or "fun" aspects of language learning are emphasized as compensating factors. [1] https://en.wikipedia.org/wiki/Force_multiplication https://en.wikipedia.org/wiki/Force_multiplication