"Estados Unidos vs." is the standard way to refer to a legal case in the United States where the government (federal or state) is prosecuting an individual or entity. "Estados Unidos" is the Spanish translation of "United States," and "vs." is an abbreviation for "versus," meaning "against." Therefore, it simply indicates a case where the United States government is the plaintiff (the party bringing the charges) and the named party is the defendant. This format is commonly used in official court documents and legal discussions, especially when referring to cases involving Spanish-speaking defendants or in contexts where multilingual communication is important.