“What language do the Vatican police speak?”/“Pig Latin.”

“The Vatican Police speak pig Latin” is a joke on the liner noted to the comedy album FM & AM (1972) by American stand-up comedian George Carlin (1937-2008). “Pig” is slang for “police.”
     
“What Language Do The Vatican Police Speak? Pig Latin!” was posted on the newsgroup alt.tasteless.jokes on June 17, 1996. “Q: What language do the Vatican #Police speak? A: Pig Latin!” was posted on Twitter by Pasta Channel on December 11, 2009.
     
“What language do police officers speak? Coptic EDIT: and Pig Latin too, I suppose. Why not?” was posted on Reddit—Dadjokes on September 21, 2022.
   
         
AlbumLinerNotes.com
GEORGE CARLIN
FM & AM
Original 1972 album liner notes
Nixon is soft on fascism.  The gross national product is gross.  Elephantitis does not improve the memory.  Mothers’ milk leads to heroin.  If you break a crumb in half, you have two crumbs.  When stepping on the brake, your life is in your foot’s hands.  The U.S. Plywood building is made of steel and stone.  There are no two dandruff flakes alike.  Beer nuts is the official disease of Milwaukee.  Everyone over 110 is out of work.  Rose Kennedy wears a natural.  Give a Shriner a shiner.  Recycle confetti.  No two ways about it, there are two sides to every story.  Edgar Cayce was not a medium, he was an extra-large.  The Vatican Police speak pig Latin.
 
Newspapers.com
16 March 1974, The Gazette (Montreal, Quebec), “Look what the kids are up to now!” by Paul Grescoe, The Canadian Magazine, pg. 2, col. 2:
Winnipeg teens like the hip recorded humor or rock satirists Cheech and Chong and George Carlin (“The Vatican police speak pig Latin”).
   
Google Books 
Language Play:
An Introduction to Linguistics
By Don Lee Fred Nilsen and ‎Alleen Pace Nilsen
Rowley, MA: Newbury House Publishers,
1978
Pg. 207:
Equivocation is what is at the base of playing with logic in such statements as the slogan “Not to decide is to decide” and the joke “The Vatican police speak pig Latin.”
 
Google Groups: rec.arts.anime 
[SAILORMOON] Tuxido Mask
Brian Smith
Oct 4, 1995, 3:00:00 AM
(...)
... OFFLINE 1.52 “The Vatican police speak pig-latin”
   
Google Groups: alt.tasteless.jokes
some religious jokes
Laura Schooler
Jun 17, 1996, 3:00:00 AM
(...)
What Language Do The Vatican Police Speak?
Pig Latin!
 
Twitter 
Pasta Channel
@PastaChannel
Q: What language do the Vatican #Police speak? A: Pig Latin! ThePastaChannel.com
7:02 PM · Dec 11, 2009·Ping.fm
 
Twitter
alexiQ8Dy
@alexiQ8Dy
What language do the Vatican Police speak? Pig Latin!  #sexy
2:30 PM · Mar 9, 2013·Twitter Web Client
 
Reddit—Dadjokes
Posted by u/bassistheplace246 September 21, 2022
What language do police officers speak?
Coptic
EDIT: and Pig Latin too, I suppose. Why not?
COMMENTS
dirtymonny
All I know is they use ham radios
TomAto314
Coptic - the language of the Copts, which represents the final stage of ancient Egyptian. It now survives only as the liturgical language of the Coptic Church.
Just in case someone else didn’t get it, I’ll save you the google.
 
Twitter
Funny Dad Jokes
@FunnyDadJokess
What language do police officers speak? 
Coptic
#humor #dadjoke
4:28 PM · Sep 21, 2022·IFTTT