I quite liked the old English of Ye, Thee, Thy etc. Although the lead actresses American accent gives it away on a few occasions. But still well acted throughout.
Great, but I didn't really believe that the characters were natural in that language.
I must admit I just assumed Anya Taylor-Joy was English – I don't remember thinking about an accent slipping. I did find that more with Kate Dickie though.
My favourite acting in it was from Harvey Scrimshaw. I thought what he did at his age, and how precise it was, was fantastic.