The original novel Planet of the Apes was written in French, so while the film might have been an American product, I do not think it would be a reach to have this amazing movie poster in French. Not only is the Jean Mascii designed graphic crisp and eye catching, but the thing is a whopping 47×63.
According to Hakes:
47×63” “Grande” French poster for the French release of the 1968 20th Century Fox sci-fi film classic. Poster features amazingly detailed art image by French artist Jean Mascii depicting star Charlton Heston at front on leash being manhandled by 2 gorilla soldier/guards. Bkg. scenes show Heston running with gun as apes scramble about. Surreal ape village architecture and planet is seen in bkg. Poster has been folded as issued and has lt. margin wear with some creasing. A few .25” tears at fold crease intersections. Poster remains extremely bright and bold, its graphics far outweighing that of any American released poster. If framed, poster would display Exc.