But not French ;-)
I like the way you think.
How they got to France in the 1850-70 frame is conjectured and has something to do with a flying locomotive, though any who reported seeing such a thing were immediately taken up for insanity (that how Spanish gained the word "loco" for "crazy").
This can be verified. I will gather the necessary documents and present them for your perusal in about 46 years.