Lightning
Master Member
That can be problematic in historical pieces simply because language is in a constant state of change/modification. I'd much rather a movie that's set, say, in Medieval times (to use your example), primarily written in English, use modern forms of that language so the audience will readily understand what is being said rather than have them require a crash course in Medieval English to understand dialogue
the flipside of this is "the Tiffany Problem" where certain words, phases, items, ect. are older than most people think, so using them correctly would break immersion.