Mitfreude is the word that actually exists. If you want German for sympathetic joy, this is it — in the dictionary, morphologically normal, and built exactly like Mitgefühl. Freudenfreude is what happens when a concept gets a name from the wrong language.
Side by side
Aspect
Freudenfreude
Mitfreude
In DWDS
No entry
Full entry
Built as
Joy-joy
Joy-with
Origin
English
German
Citations in DWDS
None
Back to 1954
What each one means
Freudenfreude
Freudenfreude is an English coinage for the pleasure of being genuinely happy about someone else's good news, in circulation since the 1970s and widely known only since 2022 — and it is not a German word.