"Kursive" (with an "e") technically means the same as "Schreibschrift" (aka handwriting developed for quick penning, generally attached). "Kursiv" (without "e") in turn means "italic". But despite being technically correct German it isn't commonly used.
It's just like how in Dutch we do also have the word "italiek" for italic fonts, but it's rare to see it used and we generally use "cursief" (whereas what is called cursive in English is called "schrijfletters" in Dutch). Both are technically correct Dutch, but the first you will pretty much never see used by native speakers.
I guess American shows sometimes find these kind of rare-but-technically-correct words when translating and run with it without realising no one actually uses that word. Which is indeed bad translating.
