It doesn't matter. It's better if it's something that sounds like we would speak today, because for those people living then it didn't sound like 'old' English, did it? I suppose it's better that we have those little Americanisations, like saying 'Yeah.' I don't think a very high-class English person would have said, 'Yeah,' but it doesn't really matter.

I had a couple of lines yesterday that I thought, 'Do you mind if it sounds a bit American?' They didn't, and I don't either. It's fine, as long as the audience don't think, 'That's suddenly American.'