What does one do when the class decides on a Yr 12 motto that is in another language that no one knows and the word doesn't mean what they think it means (a home, a place where one receives strength), but really means a place in a bullfighting ring? Strikes me as mad...
I tried to treat this as a riddle and figure out what motto or word it could be, but I didn’t find it lol

I can see that you’re frustrated with the motto. It might be hard to accept, but the significance of the motto is between you and your classmates, right? Regardless of the dictionary definition, the connotations and unique meanings that motto or word will have for your grade might be something you can look at positively

If seems like you didn’t know it actually meant something to do with bullfighting to begin with. So instead of donning a cynical attitude to the decision your friends have made together, it might be more fun for you to create your own meaning from it.