The original is used, as is a French version - It (or she) just has a certain je ne sais quoi . People who don't know any other French besides RSVP still use that -- that's how common it is. A certain something, but I can't put my finger on what it is.
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This means that your first one is used, AND that the French version is used.
The original is used, as is a French version
This means that it's also fine to use.
But "There's something about her" is also fine.