It just struck me that the Danish word for happiness (glæde) is both a noun and a verb.
So in Danish you can experience happiness (føle glæde) but you can also “happy someone else” (glæde en anden).
As in: “I think this will happy my spouse” (det vil glæde min partner) or “small acts can happy others” (små ting kan glæde andre).
I don’t want to read too much into that linguistic quirk, but it is interesting because it goes to the heart of what happiness is – i.e. very much something we do for each other.
Can you think of another language that has this feature?