In Gaudete the second verse
Unde lux est orta
is a reference to Ezekiel 44:1-4. Everybody likely to listen to Christmas carols in Latin probably already knew this, but it was new to me.
Continuing the French theme, here’s Noël Nouvelet sung by Lorenna McKennitt.
Finally one in English: Shepherds Arise, by the Richard Huish College Folk Quire.