In Spanish, caca means poop. Next time I'm constipated, my mantra will be fortuna caca est.
That seems to correspond with the Latin word. Of course Spanish use mierda too. But the translation as you put it would be "Fortune shit it is."
@THHA How would you say something like, "To shit is fortunate"?
I would think, "Cacāre fortunatus est." if cacō is masculine.
Ask your doctor about linaclotide (linzess) if you have a persistent issue.