I was really annoyed when I heard that they speak Modern English in Beowulf (still reluctant to see it for that reason)... the idea of people speaking Modern English in 10,000BCE ... words escape the ridiculousness.

And from what I've seen in the trailers, the actors all have modern day physiologies too - strong, tall, clean, good teeth, not limping... they should be filthy and disease-ridden like the peasants in Monty Python's Holy Grail and The Life of Brian, where even upper elite rich politicians like Pontius Pilate and Biggus Dickus had no access to speech therapy (because no amount of money at that time would've given them access to medical treatment that didn't exist back then!).