Expañol* is a high probability typo on the Ballard List, occurring over 340 times in Worldcat.
When I first saw the error, I thought it was an invented language, like Esperanto. Perhaps an expansion of Español to include slang terms from other languages? Or a code word for a plot by Spaniards to expand and take over the world?
Though I'm happy as long as the plans of our Expañol friends don't involve making a horror film as bad as Incubus, which was written entirely in Esperanto. Incubus starred William Shatner, who bizarrely pronounces his Esperanto with a French accent.
(Image from Incubus taken from Wikipedia)