[Jim Noble]

I think it's Middle English. Old English looks like this:

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.

[Responsibility2nd]

Alex, What is...

The Lord’s Prayer.

(Correct, for $1,000!)

[Hyzenthlay]

I haven’t checked to see if anyone else got it, but is that the Lord’s Prayer? It looks a bit influenced by Latin, to be honest.