| Interesting idea, I believe the easiest way to introduce this is maybe by using existing languages as in-game languages.
It would familiarize to other languages and would teach basics at the very least.
You could, say, have one teacher in each city being able to give you "lessons" about X or Y language and you'd be ale to raise your skill that way, then you could even have registrations for a "examination" to get a higher language skill, "competing" against other players (trivia style).
And of course by using existing elements where possible, that would help teaching basics of physics and biology I guess.
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