He also named the German cleric Wiching the Bishop of Nitra, and Old Church Slavonic was recognized as the fourth liturgical language, along with Latin, Greek and Hebrew.
Ia juga menunjuk klerus Jerman Wiching Uskup Nitra, dan Gereja Slavonik Kuno diakui sebagai bahasa liturgi keempat, bersama dengan Latin, Yunani dan Ibrani.