French missing translation for incorrect password

[Clems6]

Hello,
I have lightdm-gtk-greeter set in French language, indeed everything is in french except when I enter a wrong password. In this case I see this sentence in English : "Your password is incorrect. Please try again" instead of having it translated in French.

The correct translation in French for this sentence would be : "Votre mot de passe est incorrect. Veuillez réessayer s'il vous plait."

Thank you for your help and for your work.