On: every psalm and song in the daily prayers uses today’s English. Off: all of them use the older “thee and thou”. Until you choose, the Songs of Zechariah, Mary and Simeon use today’s English, as most churches sing them. The Lord’s Prayer and the prayers for the dying show the form most people learned.
Luther's 1517 propositions against the sale of indulgences, posted or sent in Wittenberg on October 31. Written in Latin for academic debate and not intended to start a schism.
In History — The Reformation, and the people who carried it.