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Why is the article headed with "harmonika" -- with a "k", when all of the subcategories listed refer to "harmonica" with a "c"?

Consistency might be in order here: either stick with the German spelling, or stick with the English spelling. Since the article in in English, I suggest changing the heading to "Harmonica" -- with a "C" --, and redirecting references to "harmonika" -- with a "K", here.