In October 1939, the Angelic Pastor had the following to say on the matter:

Iesu Christi Ecclesia, utpote fidelissima almae divinaeque sapientiae custos, non ea pro certo nititur deprimere vel parvi facere, quae peculiares cuiusvis nationis notas proprietatesque constituant, quas quidem populi iure meritoque quasi sacram hereditatem religiose acerrimeque tueantur.  

[Pius XII, Summi Pontificatus, 44-45 (AAS)]

This was quoted by Pius XII's immediate successor as

The Church of Jesus Christ is the repository of His wisdom; she is certainly too wise to discourage or belittle those peculiarities and differences which mark out one nation from another. It is quite legitimate for nations to treat those differences as a sacred inheritance and guard them at all costs. 

[John XXIII, Mater et Magistra, 181]

It's now been watered down even further on the Vatican's official website as

The Church of Christ, the faithful depository of the teaching of Divine Wisdom, cannot and does not think of deprecating or disdaining the particular characteristics which each people, with jealous and intelligible pride, cherishes and retains as a precious heritage. 

There's a reason they don't want ordinary people to understand Latin.