Translate the following English sentence to French:
"With regard to closer cooperation, it must be emphasised that the principle of flexibility on which this is based and which we support should not prevent the guarantee that no Member State can be excluded from participating in this cooperation, except on its own initiative."
En ce qui concerne les coopérations renforcées, il faudrait opposer au principe de flexibilité sur lequel elles reposent, que nous appuyons, la garantie qu' au départ, aucun État membre n'en sera exclus, sauf si telle est sa volonté.