I think every country needs to have a mandatory bilingual policy
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)
they should learn their respective countries. I assume dialects like Black American Sign Language would be preserved through social learning. although a universal sign language could be cool. i think we should learn sign language because deaf people cant learn how to hear.
And where does this slope end? We all have to learn how to speak to neurodivergent people in an inclusive way because neurotipical communication can lead to misunderstanding???
In the post-atomic horror of the near future you will need sign language to signal your comrades while you engage in urban stealth combat against the techno-barbarians of the rad wastes
To communicate with deaf or hard of hearing people, to communicate with someone when you both can't hear eachother, to commicate with infants, to committed with non verbal people, etc but just communicating with disabled people should be a good enough reason