Submit all : modify "you must answer at least one question" message

Hello,

I want to translate a Captivate project from French to English.

When I use the Submit all button on a quiz without answering any question, I have this message "Vous devez répondre à au moins une question pour pouvoir continuer".

This means "You must answer at least one question to continue" (nor sure of the translation).

But I can't find this message anywhere. It is not in Edit -> Preferences -> Parameters -> Submit all messages, nor in Edit -> Preferences -> Default labels...

Any help is welcomed !