If you are not french you will not grow. Unfortunately, it's the french way or the highway. If you don't speak french you will most likely never make it past a regional leadership role (at best). Also, Ipsen pays below market value across the board which is a big factor in why their average tenure is so low and people turnaround is so high even within such a fast-paced industry.
DO NOT fall for the "come in as a contractor and we will make you a full-time employee soon" scam they really drag the process and create a hostile environment for team members while they're in the contractor stage.