Even when you switch the language of your Sylius app, the Fullcalendar's UI is on English (default).
It's added a way to use the app's current locale to sync both (the app and fullcalendar) translations
I already made a PR for both things and hope it might has some value for you.
I already made a PR for both things and hope it might has some value for you.
Thank you for the great work!