In short: By the time a person is 18, they must effectively be able to communicate and understand conversationally in 2 languages and casually use them in daily life…, if not become completely fluent…
Other than that, any language goes (whether it is a locally-known one, or a popular one worldwide),
The only thing I hope to gain from this, is to rid the world of /Monolingual Betas/
Seriously though, has this been a policy before? Because I haven’t heard of such one…
I think this can especially be used for citizenship…
Edit: I don’t necessarily have any other presupposed requirements besides bilingualism, though we may have certain notions of such in this main goal
Edit II: In furthering this venture, I have realized that my liberalism may slightly poisoned my lens…
And for clarification…
Minimum dual language system:
Main national language + other language (likely another related language, but foreign ones are fine)
Canada already has the results of your thought experiment though, outside of people who work in Quebec tourist towns the only ones who can communicate well in both languages either went to private school or an immersion program. The latter are very much similar to gifted programs in that they are very much designed as a way to get additional public funds to affluent people who can’t quite afford private school tuition.
Well, I guess that answers my question…
Edit: But I think its more of a socio-economic systemic problem than a policy one, in regards to bilingual policy…