Hi, not discouraging other replies, but while you're waiting, you might want to check out a couple of earlier answers:
/u/bayoris walks us backwards through time in How far back in time could you go, before modern English becomes unintelligible to inhabitants of the British Isles?
/u/cdesmoulins gives an overview & provides lots o' links to more in Could a modern english speak with a person from the medieval in england?