The Thieves' Cant, also known as the Rogue's cant or peddler's French, was a secret language formerly used by thieves, beggars and hustlers in Great Britain and other English-speaking countries. The classic, colourful argot is now mostly obsolete, and is largely relegated to the realm of literature and fantasy role-playing, although individual terms continue to be used in the criminal subcultures of both Britain and the U.S.
Simple Thieves' Cant
The Thieves' Cant has a simple form - using the english language with certain code words to hide their true meaning. This form of the Thieves' Cant is a slang form of the english language (street talk). The simple Thieves' cant was used by many common lower class individuals (not just thieves), and was often known by law officials who had been in the field for some time.
Advanced Thieves' Cant
Thieve's Cant, in it's advanced form, is a language unto itself. It takes time and practice to learn the extensive vocabulary and the process of forming sentences. If you are truly a Thieves' Cant enthusiast, and would like to view the intricasies of the language, then it is recommended that you first read the Advanced Thieves' Cant Introduction - this introduction teaches pronunciation, sentence structure and many of the langauge's different facets.
The advanced form of the Thieves' Cant is used among Thieve's Guild high officials. Common thieves are either too stupid, or impatient to learn the intricacies, and some do not even know of the languages existance. This language is a tool of secrecy and is very rarely found in written form. To learn it, a thief must be taught by a high level guild official - the language is so rarely used, that it is often impossible to "figure out" the language him/herself.