I think he's from France, he cannot run the risk of not being able to go back to his country ever again.None G like if you gonna be there 2 years tops just dont declare s**t, dont say s**t, dont know s**t I no hablo french cause the amount of bs you are gonna have to deal with is of biblical proportions.
chances of they knowing what u up to are very slim if you keep it low, and even if they do, Id rather pay some fines than having to deal with the French IRS.