And considering, he has to be fairly well-educated. Giles!Uther does not strike me as someone who leaves anything to chance, and in Britain, being multilingual would be required for Arthur's class.

That's true, but it's one of those things nobody ever talks about (that I've found, anyway- have people been discussing this in posts I don't know about?) so it was funny to discuss it and then see something written about it turn up a few hours later.