The concepts are not hard to understand and it is not uniquely French, far from it. That said, I cannot think of a single-word equivalent in English.
It could still be adopted as a learnèd (read: pretentious) borrowing from Greek, of course, but in that case it would be spelled epicharicacy.
[0] Edit: Well, hardly ever. https://en.wiktionary.org/wiki/Citations:epicaricacy#English