I don't think "popo" is a problem in the U.S. or the U.K.

Maybe people would have a problem in Jamaica or the Philippines or other minor market.

So far as "cops" are concerned, consider the word "pig" which is a slang for cops. My neighbors have pigs, there is "pig iron", the word is used plenty and unless you have some site which exists to defame the police ("Clips" of police acting badly) I think you don't have to worry about obscure slang.