A lot of the Caravelle came from the UK. The Rolls-Royce engines, of course, and the design of the nose and flight deck was by De Havilland (and the early noses were actually built at Hatfield), which is why it looks like a Comet (unkind suggestions that the noses of grounded Comet 1s had been cut off and sent to Toulouse
). A lot of the systems stuff as well, there wasn't a great French aerospace supply industry in the 1950s.