“Erethay isay onlyay oneay Oyray Isonorbay”!
Pig latin is what is called an “argot”. An argot is a secret language used by various groups (schoolmates, outlaws, colleagues) to prevent outsiders from understanding their conversations.
The Swedish equivalent of Pig Latin is Fikonspråket or “Fig language”.
“Fit dekon finns fikon fira bakon fin ekon fiy rokon firbison okon”!
A French variant , called Verlan, is spoken by separating a word into syllables and reversing the syllables.
Verlan was first documented being used as far back as the 19th century. Today so widely used that it has spread into advertising, film scripts, French rap music. In some cases, words that have been “Verlanned” have actually replaced their original words in French dictionaries.
(If you can write French, please write “There Is Only One Roy Orbison” in verian for us in the comments. I’m curious to see it, Thanks!)
Some other examples of coded language which can be used in puzzles, poetry and songwriting:
Cockney rhyming slang
Fala dos arxinas
If you are interested in this type of thing, have fun researching these!!!