Trade language is a term used to describe a simplified form of communication that is used between two or more people who do not share a common language. The most common example of a trade language is PIDGIN, which is a simplified form of communication that is created by combining elements of two or more languages. PIDGIN is often used in trading situations, such as between merchants and customers, or between people from different cultures. It is also used in informal settings, such as between friends or family members.