Is 1984 in Old, Middle, or Modern English?

The book 1984 is written in modern English. George Orwell published the book in 1949, just after World War II. Old English really dates back to the early medieval period and is virtually unrecognizable to English speakers today. Some works that readers might be familiar with, that were originally written in Old English, were the Anglo Saxon Chronicle and Beowulf. Middle English came into being around the twelfth-century, after the Norman Conquest. A famous work in Middle English was Geoffrey Chaucer's Canterbury Tales, which are still not really comprehensible to modern readers when read in their original language. Chaucer wrote in the fourteenth-century, and more or less everything after the fifteenth-century to the eighteenth is known as "early" modern English. Orwell, as a modern writer, was using modern English, and though some words he uses might not be in common use (at least not in American English) today, his writing is comprehensible to modern readers. Of course, one thing that is interesting about this question is that Orwell himself places a huge emphasis on language in 1984. The Party has developed a new language called "Newspeak" that eliminates many words, and adds some others, to tighten their control over the minds of the people. This is a more drastic, intentional change—the changes addressed in this response took place over hundreds of years.
http://www.thehistoryofenglish.com/index.html