“How about using the Encyclopedia Britannica, an unbiased secular source...”
Are you saying Schaff LIED and posted restrictions that did not exist?
At the link, belatedly provided, he gives his sources for his quotes. The Oxford restrictions of 1408 are very well known.
Catholic theologians published reasons why the common man should NOT be allowed to read scripture in the vernacular. They argued a common man could not understand scripture - which is still largely the Catholic position: scripture must be interpreted in the light of Catholic tradition and teaching, rather than dominate what the Catholic Church teaches.
Prooftexting.