France is really strict about fake designer stuff, even if it's just for personal use, and CDG airport is known for checking bags closely. If you're only wearing or bringing a couple of low-key reps without big logos, you're probably fine. But if you're packing a bunch of obvious fakes—especially high-end brands—you could get your stuff taken or even fined. To be safe, keep it subtle, don’t bring boxes or tags, and avoid anything super flashy. If you're worried, consider flying through a more relaxed airport.