These shows are first and foremost entertainment. I have no idea what the legal ramifications are.
I don't know of any reason that a small claims court couldn't hold proceedings in Spanish assuming the judge and all the participants speak Spanish. In a Spanish speaking community in a place like Miami, it is possible that this could happen.
Is that what you are asking?
But that has nothing to do with these reality court shows. Their purpose is to generate ratings so they can sell advertisement, and to do this they try to put on a good show with interesting stories and drama. Whether the judgments are legally binding isn't important at all.