21 And if the Tridentine Synod wished "that all should use as authentic" the Vulgate Latin version, this, as all know, applies only to the Latin Church and to the public use of the same Scriptures; nor does it, doubtless, in any way diminish the authority and value of the original texts. For there was no question then of these texts, but of the Latin versions, which were in circulation at that time, and of these the same Council rightly declared to be preferable that which "had been approved by its long-continued use for so many centuries in the Church." Hence this special authority or as they say, authenticity of the Vulgate was not affirmed by the Council particularly for critical reasons, but rather because of its legitimate use in the Churches throughout so many centuries; by which use indeed the same is shown, in the sense in which the Church has understood and understands it, to be free from any error whatsoever in matters of faith and morals; so that, as the Church herself testifies and affirms, it may be quoted safely and without fear of error in disputations, in lectures and in preaching; and so its authenticity is not specified primarily as critical, but rather as juridical.
Source: Divino Afflante Spiritu (Vatican.va)