I disagree. True, the first place I look is the top right. But the second place is the footer because I've come across a bunch of sites where this is the place

I disagree. True, the first place I look is the top right. But the second place is the footer because I've come across a bunch of sites where this is the place to change language. It's common enough, I think, to be at the very least 'adequate' deesign.