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.
In the ELCA, a pastor elected to oversee a synod or the whole church for a fixed term. Lutherans understand the office as pastoral rather than as a separate order of ministry.