Given Harry’s experiments with his Bag of Holding at the beginning of the story, it seems that magic recognizes the meanings of words irrespective of whether the speakers actually know what they mean, and it doesn’t have to be any particular language. I suspect that the spells mostly sounded meaningful to people of various languages throughout history the way “wingardium leviosa” sounds like a levitatey sort of spell to an English speaker.
Given Harry’s experiments with his Bag of Holding at the beginning of the story, it seems that magic recognizes the meanings of words irrespective of whether the speakers actually know what they mean, and it doesn’t have to be any particular language. I suspect that the spells mostly sounded meaningful to people of various languages throughout history the way “wingardium leviosa” sounds like a levitatey sort of spell to an English speaker.