In my post of 02 Mar 11 - 02:42 PM, the 14th verse is indeed most interesting. The baffled knight (as imagined by that 19th century witness) partially drops his educated French and uses the local dialect. In my translation I took the liberty to sketch colloquial language, which is of course a matter of taste.

The Écu was a coin current in France for centuries, originally of considerable value (gold). In its transsubstantiation ECU it was the predecessor of the Euro (€) currency.