Don't worry, this episode isn't in French. I just thought it would be fun to name it like a futuristic perfume inspired by the fragrance.
I realized after I finished this that he should have referred to it as a "mysterious" odor. If you didn't know the astronauts were confounded by it, the joke could be lost. Oh well, what can I do? Re-do it? I don't think so. Moving on.