Employment Law Questions? Ask an Employment Lawyer.
I will answer you, but the answer the previous expert gave you is 100% accurate.
There is no "general civility" law. Swearing or even calling you names and treating your poorly are not illegal acts.
Many people mistakenly believe that a "hostile work environment" refers to general hostility, but that is not the case. A "hostile work environment" is one where the employer allows or condones illegal acts, such as sexual harassment.
If the constant swearing crosses over into some illegal discrimination (based on race national origin, color, religion, age or disability) then it becomes illegal. But there is no law that makes swearing and general meanness illegal.
So unfortunately, your remedy is to find a job that suits your sensibilities a little better.
I am sorry for your situation, but this is the state of the law, unfair or not.
There are a few random cases of workplace bullying lawsuits being successful, but it is all based on another tort, intentional infliction of emotional distress.
You can always file a lawsuit for intentional infliction of emotional distress. In order to win a lawsuit, you would have to show that the conduct was "extreme and outrageous" and outside the bounds of what society considers acceptable. You would also have to show that you actually suffered emotional distress (more that just being uncomfortable).
So there is a cause of action, but it is not based in employer/employee relations.