I have never heard about language register. Can you explain more about this?
In linguistics, a language register is any of the varieties of a language used in particular social, occupational, or professional contexts. It’s a style of language determined by such factors as social occasion, purpose, and audience. In terms of degree of formality, a language register can be very formal (very rigid, bureaucratic language), formal (ceremonious, carefully precise language), neutral (objective, indifferent, uncaring language), informal (casual or familiar language), very informal (very casual and familiar language), and intimate (personal and private language).
The three major determinants of language register are (1)
field – the subject matter of the discourse, (2)
tenor – the participants and their relationships, and (3)
mode – the channel of communication (such as spoken or written). Common non-linguistic determinants of language register are dress code, body language, and proximity of the speakers.
Certain kinds of language register that could befuddle laypeople are professional jargon like academese, legalese, corporatese, bureaucratese, and journalese. Jargon uses words, expressions, and figures of speech that are often understood only by those who belong to a particular profession or occupation, the better to communicate among themselves and the better to exclude people who don’t belong to their league.
For more about the basics of language register, click this link to
Richard Nordquist’s About.com Grammar and Composition.