If you want to impress the Pope, do it in Latin:

Franciscus Pontifex et Episcopi Romani, vicarii Iesu Christi, successoris in locum Principis Apostolorum, Summus Pontifex universae Ecclesiae Primate in Italia, Archiepiscopus Metropolita provinciam nostram, et nunc Dominator Status Ecclesiae, minister servi Dei.

But don't us Google Translate -- have someone translate it into good Latin. (I'm glad the Pope is a primate in Italy, but wonder what sort of critter he is elsewhere.)