I had to write a few scenes where Richard spoke in ‘Mediaeval speak’ and it was difficult as I knew if I tried to write how they actually spoke it would be incomprehensible.to the normal reader, so I had to make a few words ‘Mediaeval’ while keeping the bulk of it modern.. Here is an example which perfectly illustrates this. Yes, it’s from after Richard’s times, but it gives a good idea!
How they spoke 500 years ago! It sounds so much nicer than modern English.