For those of us who don’t have the time to follow a long link:
There was once a group in France, the Albigensians who created a translation that twisted the words of God to fit their own warped religion. Until this heresy could be stamped out, the local Church in France banned all translations, but it was quickly lifted after the Albigensians were put down. This might be an example of what the OP was faced with. The Church has always provided translations (Luther’s wasn’t the first German translation, and Tynsdale’s wasn’t the first English translation), but wishes the translations to follow the original intent of the author. Things like adding “Alone” to “By Faith are you saved” tends to distort the original intent of St. Paul.
If you do a Church on Catholic Answers web-site for “albigensian”, you’ll probably find more info on this subject.