I don't know if this counts, but I used the word "cafuné", which means:
"scratching someone's head with your fingertips, popularly considered a gesture of care and affection. Typically, cafuné is an affection made between people with some level of fraternal intimacy, usually between family members, couples or close friends."
It's a word with such deep meaning and I couldn't find an english word that had the same impact as "cafuné" in my mother language (portuguese) hehe~ I also recently discovered that there's a band called Cafuné - which sang the music "Tek it" - and they named it because they liked the word
I used the word in this fuzzy chapter :