True, Howard....but my point is that Latin was widely understood and used by educated people....and no doubt, Latin lyrics would appeal to a much wider audience than Finnish ones.

Confirming what Dave says, quite a number of songs from Piae Cantiones appear in the Oxford Book of Carols. I think a big reason for that, is that the melodies are so engaging. They're certainly not your standard anthems.

The melody for "Gaudete" sounds almost modern, like it could fit in Carmina Burana.

-Joe-