Special language that is regularly used in a particular field but which may not be meaningful to people outside the field is called Jargon
Jargon is the technical language that is specific to a given industry or field of endeavour. Jargon is typically used in a certain open setting and may not be widely understood outside of that area.
The context is typically a specific occupation (i.e., a trade, profession, vernacular, or academic topic), but jargon can exist within any ingroup.
The main characteristic that distinguishes language from the rest of a language is extraordinary jargon, which often includes words that are well defined for it and various faculties or implications of words that outsiders would typically take in another sense, misinterpreting that correspondence endeavour.
Sometimes jargon is perceived as a form of specialised shoptalk and afterwards identified by the formal language used in a particular industry.
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