Latin is the official language of the Catholic Church, and enjoys pride of place in the Liturgy. "The use of Latin is to be preserved in the Latin rites." (Constitution on the Sacred Liturgy, 54) Latin has been used in the rites of the Western Church since at least the fourth century, if not earlier. Latin helps us overcome limitations of time and place, and helps us participate in the universal reality of the Catholic Church, linking us with the generations who have worshiped before us. The use of Latin in all countries and across the centuries is a powerful symbol of the Church's unity. The use of Latin enables also the use of the great liturgical music of the Church, particularly plainchant and polyphony. Vatican II said: "The treasury of sacred music is to be preserved and fostered with great care." (Constitution on the Sacred Liturgy, 114)

Here are some common phrases from the liturgy, and their meaning: