Quote:
In Russian, "caca" translates to something you never want on your coin or anything else you intend on keeping or handling... or smelling.
Yeah, exactly

Supposedly a few Russian committees on something starting with a C had to be renamed to avoid their abbreviation being pronounced "caca"; no idea if that actually happened though (but even if it didn't, that's a worthy urban legend).
IIRC, this word also means the same thing in Spanish as well (but I don't really know much Spanish).