Mediator is a person who helps you figure out whether there are issues you can agree upon. The mediator is neutral. The mediator cannot order you to do anything. The mediator files a report with the court about the outcome of your mediation. Motion is a paper you file with the court, asking the judge or CMO to decide an issue.
Mutual children are the natural or adopted children of the two parties.
Parental Rights and Responsibilities case is the type of court case you or the other party filed if you were not married. If you were married and had mutual children , the divorce order addressed parental rights and responsibilities issues, as well as property and spousal support issues. Many post-judgment motions ask the court to enforce or revise the parental rights and responsibilities part of the original order. Plaintiff is the person who filed and served the court papers to start the original case. If you were the plaintiff before, you are still the plaintiff now, even if the other party filed the post-judgment motion.