When we encounter a word, and we suspect it to be French, then sometimes we just go a little crazy with the way we say it and throw huge accents on parts of the word that really don't want them. If you're fortunate enough to have a very large home, you may have invited people into your foyer before. You'll definitely have at least walked through one if you've been to the cinema or the theater, and you may have heard other people or even members of staff welcome you to the "foy-ay".
That's the strange interpretation of the accent we were talking about. What part of that word suggests that it should have an "ay" sound at the end of it? We don't know how it got so messed up, but whether you're in France or not, you're in the "foy-ur".