sublanguage

Etymology

sub- + language

noun

1. (computing) A subset of a language, in particular of a programming language.
   DML is considered a sublanguage of SQL. It's concerned with manipulating data stored in the database. DML consists of four commonly used statements: INSERT, UPDATE, DELETE, and MERGE. 2015, Miguel Cebollero, Michael Coles, Jay Natarajan, Pro T-SQL Programmer's Guide, Apress, page 4
2. (linguistics) A language restricted to a specific context, such as a particular subject area.
   the sublanguage of weather bulletins
   We define sublanguage here as the particular language used in a body of texts dealing with a circumscribed subject area (often reports or articles on a technical speciality or science subfield), in which the authors share a common vocabulary and common habits of word usage. 1982, Richard Kittredge, John Lehrberger, editors, Sublanguage: Studies of Language in Restricted Semantic Domains, Walter de Gruyter, page 27
   Sublanguages are usually taken from science and technology domains and are restricted to a particular topic. 1995, Douglas Biber, Dimensions of Register Variation: A Cross-Linguistic Comparison, Cambridge University Press, page 16