For the last one hundred years, scholars have been digging their way through documents in order to create the Dictionary of Medieval Latin from British Sources, "the most comprehensive study ever" of medieval Latin vocabulary. The 16th and final volume of the dictionary was completed in early December 2013.
According to the BBC article about the completion, "The dictionary details the Latin language used in Britain between 540 AD and the year 1600, drawing its contents from the Domesday Book, the Magna Carta and thousands of other documents." It includes more than 58,000 entries. The project began in 1913, overseen by the British Academy.