Language in my school and special rules in my school

The language in my school is mostly nasty. To friends and teachers is the most in the school friendly. Many is rude and mean to each other. Like racism, nasty words and . The world's community use bad words daily. It's some "gangs" that always use bad words. And it's even some teenagers that never talk and have no friends. If we come 3 minutes late to a lesson the teachers login on Edwise and add 3 minutes unauthorized absence, if we get to much unauthorized absence we need a talk with me, teacher, parents and school principal and need to talk what can happen and how to stop it. We can't wear whatever we want like racist t-shirts, it can be the Swedish flag, bad words or something they think can be offending for anyone.