Veterum Sapientia – Apostolic Constitution of Pope John XXII – Study of Latin – February 22, 1962
“A primary place
But amid this variety of languages a primary place must surely be given to that language which had its origins in Latium, and later proved so admirable a means for the spreading of Christianity throughout the West.
“And since in God’s special Providence this language united so many nations together under the authority of the Roman Empire — and that for so many centuries — it also became the rightful language of the Apostolic See. Preserved for posterity, it proved to be a bond of unity for the Christian peoples of Europe.”
The nature of Latin
“Of its very nature Latin is most suitable for promoting every form of culture among peoples. It gives rise to no jealousies. It does not favor any one nation, but presents itself with equal impartiality to all and is equally acceptable to all.”
Lingua Latina – Motu Proprio of Pope Benedict XVI – On the importance of the Latin language – November 10, 2012
“After the fall of the Roman Empire of the West, the Church of Rome not only continued to use Latin but, in a certain way, made herself its custodian and champion in both the theological and liturgical sectors as well as in formation and in the transmission of knowledge.
“In our time too, knowledge of the Latin language and culture is proving to be more necessary than ever for the study of the sources, which, among others, numerous ecclesiastical disciplines draw from, such as, for example, theology, liturgy, patristics and canon law, as the Second Vatican Ecumenical Council teaches (cf. Decree Optatam Totius, n. 13).
“In addition, precisely in order to highlight the Church’s universal character, the liturgical books of the Roman Rite, the most important documents of the Papal Magisterium and the most solemn official Acts of the Roman Pontiffs are written in this language in their authentic form.”