French Alternative forms c’est celui qui dit qui y est Pronunciation IPA(key): /s‿ɛ sə.lɥi ki di ki l‿ɛ/ Interjection c’est celui qui dit qui l’est ! (childish) I know you are but what am I? takes one to know one! See also tu peux parler !Wikiwand - on Seamless Wikipedia browsing. On steroids.