
this is
a sexy French maid costume
The Big Bang Theory Season 5, Episode 21

Who, although she was a naturalized
French citizen, was Polish by birth!
The Big Bang Theory Season 6, Episode 4

No, I'm not. French fries have three variables:
crispiness, saltiness and shape.
The Big Bang Theory Season 8, Episode 3

Well, I think you're delightfully droll.
Or as the French say:
The Big Bang Theory Season 1, Episode 15

- How is that not a brainiac?
- Well, for one thing, she was French.
The Big Bang Theory Season 2, Episode 1