Short term or long term happiness isn’t differentiated in the untied states. I don’t think of happiness in terms of long or short term. Just as a temporary state that hopefully last a long time.
Think of all the words we use to express love in English. In Chinese a word technically exists for love but it’s not used between people more for things but even then it’s not the same word. This is a perfect example of the characteristics of a language representing a change of perception on something as powerful as expressing love.