What is the term for specialized language used by a particular group, including slang and buzzwords?

The term for specialized language used by a particular group, which includes specific jargon, slang, and buzzwords, is jargon. Jargon refers to language that is tailored to a particular profession, industry, or group, and it often includes technical terms or abbreviations that may not be easily understood by outsiders. This specialized vocabulary serves to facilitate communication among members of that group, enhancing efficiency and a sense of belonging.

In contrast, dialects refer to variations in language based on geographic regions, encompassing differences in pronunciation, vocabulary, and grammar. Colloquialisms are informal phrases or expressions that may be understood within certain regions or groups but do not necessarily pertain to a specific profession or specialized context. The term "reg jargon" appears to be inaccurate or less commonly used compared to the well-established term "jargon."