Once you schedule an email to be send at a time you can modify it using a drop down menu. In english "Modify Email".
It's translated "Modifier l'adresse e-mail" in french but this is incorrect and mean "Modify the email address".
It should be "Editer l'email" or "Modifier l'email".
I saw a LOT of translation error in french, but this one is very disturbing and I spend 30min searching for the function.