Beo-wolf
that was easy
( Grrrmachine the indifference engine, Thu 11 Jun 2009, 21:23, archived)

Whan Cnut Cyng the Witan wold enfeoff
Of Infangthief and Outfangthief
Wonderlich were they enwraged
And wordwar waged
Swarë Cnut great scot and lot
Swingë wold ich this illbegotten lot.

Wroth was Cnut and wrothword spake
Well wold he win at wapentake
Swingéd Cnut with swung sword
Howléd Witane hellë but hearkened his word
Murië sang Cnut Cyng
Outfangthief is damgudthyng.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Thu 11 Jun 2009, 21:29, archived)

Sad as it may seem
I can translate most of that
(bogus official shove it up your cunt, Thu 11 Jun 2009, 21:49, archived)

Not surprising, as it's a modern* parody.
* 80 years old, rather than 1500.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Thu 11 Jun 2009, 21:58, archived)