It didn't seem to hurt the Church from the time of Pope St. Damasus(4th Century) until 1967.
Ever since the Renaissance, the study of the classical languages was becoming more and more prevalent. People were becoming aware that there was nothing holy about Latin, just as there was nothing holy about Greek, Hebrew, Aramaic or any other classical language.
Since this was becoming common knowledge, the Catholic Church was on the defensive. They didn't want the Mass or the Bible in the common tongue.
Over the years, however, and because of dwindling numbers, they changed their tune.