If you're going to say "cockaroach," go to the perfectly valid cucaracha instead.
I live in California. If your listener doesn't know basic Spanish nouns, that's their lack.
But "cockaroach" is still not a word, unless you're referring to the monstrous offspring of a rooster and a roach.
Note this rant has nothing at all to do with this morning's Psycho Donuts gig. Apart from myself, they're completely vermin-free.