Definition - The ability to speak a language you have never learned.
Note: Some claim that people who speak in tongues are often xenoglossic.

Example -
Non. Je ne parle pas la Francaise. Pas un mot!

Etymology -
The word derives from the Greek xenos, foreign + glossa, tongue.

Oxford English Dictionary -
Its first citation is from 1978:
"Samarin would call the event of persons speaking in a language unknown to them *xenoglossia, something different from glossolalia."
Note: The first citation for the word xenoglossy is from 1914.
(Amer. Speech LIII. 67 )

Please comment