Probably not still flying, but for a number of years I kept seeing an N-registered Air France 747 when I was at CDG.
Likewise, Air France had a couple of 737s on its routes between Miami, Guadeloupe, Martinique, Guiana. They were N-registered. These have long-since departed. Guadeloupe and Martinique are an integral part of France and thus the EU. Euro currency and the whole bit.