glossonym
nounUK /ˈɡlɒsəʊnɪm/
US /ˈɡlɔːsoʊnɪm/
A glossonym is a name for a language.
"English" is a glossonym for the language spoken in many countries.
OTHER MEANINGS
2. A term used in linguistics to refer to the specific label assigned to a language variety or dialect.
The glossonym "Cantonese" refers to a variety of Chinese spoken in southern China.
3. A name by which a language is known to outsiders, often differing from what its speakers call it.
"German" is an exonymic glossonym, while "Deutsch" is the endonymic one.
4. A word or phrase functioning as a proper name for a language in cataloging or bibliographic systems.
Librarians use the glossonym "Spanish" as a standardized subject heading.