Calendar in french

I don’t find the way to force the calendar showing buttons in french. I tried to force locales, but they seems to be already the good ones…
Any idea ?

Ok ! I found a solution : i created a template for the calendar’s block in which i added this into the “fullCalendar” function :

                buttonText: {
                    today:    "aujourd'hui",
                    month:    'mois',
                    week:     'semaine',
                    day:      'jour',
                    list:     'list'