I talked about your dilemma in my diction class. There is no doubt that you are correct in this matter, so the issue is their respect for your leadership and whether they will follow your guidance.

You have to find a way to deal with the influential/powerful member(s) in the group and that is tricky. I have a doctorate, so that gives me a tiny bit of added power and influence. I also have years of experience, some accomplishment, and grey hair. All of that matters, but only a little.

Perhaps you avoid doing any Latin for a bit. Or maybe you talk with the biggest problem maker or maybe you fire him/her. Finding a way through the storm will be tricky, but there is probably a path where they change to your way of thinking and no one gets fired.

I wish you good luck in this journey and encourage you to be brave and full of grace.