O come, all ye faithful, Joyful and triumphant! O come ye, O come ye to Bethlehem; Come and behold him Born the King of Angels:
Chorus: O come, let us adore Him, O come, let us adore Him, O come, let us adore Him, Christ the Lord.
God of God, Light of Light, Lo, he abhors not the Virgin's womb; Very God, Begotten, not created:
Sing, choirs of angels, Sing in exultation, Sing, all ye citizens of Heaven above! Glory to God In the highest:
Yea, Lord, we greet thee, Born this happy morning; Jesus, to thee be glory given! Word of the Father, Now in flesh appearing!
Adeste fideles læti triumphantes,
Deum de Deo, lumen de lumine
Cantet nunc 'Io', chorus angelorum;
Ergo qui natus die hodierna.
There are additional Latin verses in various sources. For example:
En grege relicto, humiles ad cunas,
Cantet nunc hymnos