The Statute of Pleading - 1362

So your in court in England in 1362 and the lawyers aren't speaking English and you don't speak French.  Why is this happening?

This law is seen by some as the supremacy of English over French in the nobility in England, that is not quite accurate but an interesting discussion none the less.

References
The Use of English: Language, Law, and Political Culture in Fourteenth-Century England  - Link
The Rise of English, the Decline of French: Supplications to the English Crown, c. 1420- 1450 - Link
The Anglicisation of English Law - Link

With special thanks to Purple Planet Music who provided me with the intro track - Passport