What does 'jargon' refer to?

Jargon refers specifically to a set of specialized terms and expressions used within a particular profession, group, or field that may not be easily understood by those outside that group. This specialized language serves to convey succinct information among members who are familiar with the terminology, but it can create barriers for outsiders who are not conversant with the specific terms used.

The choice regarding polite expressions refers to euphemisms, which aim to soften the impact of harsh or blunt statements. The broader term for language in writing encompasses all forms of written communication, not just specialized language. Lastly, emotional associations of a word describe connotations, which pertain to the feelings or ideas that a word may evoke rather than its specialized meaning. Jargon thus stands apart as it is specifically linked to technical or niche communication within certain domains.