Not so surprising actually. Your in 'normals-ville' where the kids listen to adults and ALL adults are in charge of ALL kids. Notice that you have not heard from the kids moms about 'yelling' at their kids? Of course not, for two reasons 1. The kids didn't tell their parents cause they know they were wrong and that their parents might punish them as well. 2. Even if some mom did hear about it they are HAPPY you took control.
Swearing in our home is accidental. My husband works at a jail and it kind of becomes part of his vocab. He works very hard not to cuss when he's home, but sometimes he slips. I work at a race car shop. Sometime I slip. My 8 year old son will look at us and say "Mom/Dad, could you please not cuss in front of me?" Makes us feel guilty, then we hug him and his sister and apologize.
"Oct. 16 - KGO - It's no secret -- many middle school students now swear like drunken sailors. The question is how do you stop it?"
Put adults back in charge! We dont tolerate bad language in our household and swearing happens in school because of the children who come from an environment where the parents do tolerate it.
Cleary you solved it by moving from a place where the inmates run the asylum to a place where the adults are in charge.
Well done.