“Old English is used throughout, and most of the Mass...”
No, it isn’t. I wish people would learn the difference between Old English (the language of the Anglo-Saxons) and Olde English (which is really just a silly name for Elizabethan English).
Fæder úre, ðú ðe eart on heofonum,
Sí ðín nama gehálgod.
Tó becume ðín rice.
Gewurde ðín willa
On eorþan swá swá on heofonum.
Urne dægwhamlícan hlaf syle ús tódæg.
And forgyf ús úre gyltas,
Swá swá wé forgyfaþ úrum gyltendum.
And ne gelæd ðu ús on costnunge,
Ac álýs ús of yfele. Sóþlice.
Heh.