If, as many people (that I know at least) would claim, mathematics should be considered a language, then yes more alphabets (symbol sets with attendant structures) matter and help in both languages and general learning, at leat in my experience. Even the trivial bit of Russian I learned in high school also helped me in more ways than most things do. All I remember of it now is a ~dozen phases and words, but the underlying viewpoints of a considerably different culture have stuck better and help a lot when dealing with non-US citizens. Each additional set adds to it, but that first one after the initial set gives the most benefit. Not too surprisingly, it seems to be a declining exponential curve.
But while mathematics and, say, music are talents that are well-known to sort together, I haven't heard about mathematics and languages going together, other than as part of an old-fashioned classical education.
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