It is an interesting exercise but I find its usefulness is limited by the fact that this approach mixes up orthography, grammar and pronunciation. If we simply listened to the passages being spoken, and particularly if we were able to interrogate the speaker, our understanding would go back in time far farther than most people realize.
Studies of Elizabethan sailors have shown that most men would be functionally fluent in the language of any port they visited within about a fortnight of arriving. Their overwhelming advantage over us literary, educated, types was that they were illiterate. They just wanted to understand and communicate and were quite indifferent to what we would call 'mistakes'. Their only mistake was failure to communicate so their progress was rapid and relatively simple, anywhere in the world.
Language is a fascinating thing: humans use it and change it constantly. There is no ultimate 'correct' language, even though humans carry with them an idea of correctness and a social judgement on the way people speak. Listening from the other end of the audioscope, the story would run that it is the language itself that actually makes us human. So for a real, fascinating and never-ending debate, launch out into the discussions of speech and hearing impediments, undecyphered languages and feral children. Fascination awaits.