“Gaudete.” http://www.youtube.com/watch?v=jpRD4-uINBc Gaudete, Steeleye Span At least, I think that it’s a Christmas song.
It is wouldn’t have guessed the Finnish/Swedish thing though, I would have guessed southern France.
Don’t you protestant heretics know Latin when you hear it?
“Christus est natus
ex Maria virginae, Gaudete.”
.
Seems fairly obvious to me…