In reply to The Bantam:
Yes, and I thought about that.
My experience is that language lessons (sorry to the teachers, particularly mine) are rarely cerebral, certainly in the first six months.
They're more about rote learning, vocabulary and "Isn't it a funny culture ?" and "Do they really wear fur hats and drink a lot of vodka ?" anecdotes.
I know the OP's no fool, and thinks for themselves (there are other people I'd have taken a different tack with.) I didn't think they'd be put off by my comments, but that they'd appreciate a level of realism and some specifics on the stuff I can comment on.
So my analysis: if the OP thinks there's any chance of them actually using any of the languages, it might be just about worthwhile having a go at "menu-level" language, and I've confirmed that it is for Russian. If not, then take your pick for fun of which culture you might want to learn a bit about.
If you want "cerebral" "about" a language, I can only guess you might find it on a linguistics course. I think I was hoping for that when I did some of my languages. I never found it on a language course. Seriously, twenty hours study would get you further with avalanches, or the weather, or Islamic architecture...
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