Italian, again

[finta]

I wonder just how important it is to learn an Italian word for a type of food that I don't eat and wouldn't recognize.  Like  "zwieback."  In books, zwieback is the sort of food you fall back on when you're really hungry and there's nothing else around.  Or you give it to teething babies.  From which I deduce that it's hard and something that doesn't go bad easily--a type of hard bread?

But do I try to learn the word for "zwieback" in Italian?  After all, how necessary is it to know what it is in Italian if I've never eaten zwiebacks and never plan to?

Yet I hate not to know a word.

*debates uselessly with self*