Well, I refer to this on SquareSpace : "Select the language people see when they visit your site. Default text on your site will appear in this language."
Actually, I don't have any extension other than Setmore which is my scheduling software (so no translation extension or anything). They (Setmore), only offer their extension in english so they referred me to the site host to see what could be the problem.
my site is www.solutionventech.com
I attached a screenshot of the location of the scheduling extension where you can see the problem (you have to accept the agreement, chose any service, and then you get to the calendar when the problem is for tuesdays and wednesdays.
If you need anything else, let me know, and thanks for helping out !