Secret languages are forms of communication that are intentionally designed to be understood only by a specific group of people. These languages can include codes, ciphers, or even made-up words and phrases. They are often used for privacy, security, or to create a sense of belonging among members of a group, such as spies, children, or secret societies. One well-known example of a secret language is Pig Latin, which alters English words to make them sound different. Another example is Morse code, a system of dots and dashes used to convey messages in a way that can be easily transmitted over long distances.