epilanguage

A second language used regularly for some purpose or purposes (such as for scholarship and scientific research).

2006 Pascale Hummel, "Epilanguages: Beyond Idioms and Languages," Call for Participation, 10 May 2006. Somewhere between archiphonemes/archisemes and metalanguages, which could be considered semi-synonyms, the "epilanguages" are the linguistic realities and results generated by the use of a second language for scholarly and scientific purposes.

2009 Claudia Stancati, "‘Mais j’en écrirai en latin’. Latin as an 'Epilanguage' in Descartes’ Philosophy," in Pascale Hummel (ed.), Epilanguages: Beyond Idioms and Languages, Philogicum, Paris, 2009. In a letter to an unknown person, in which he discussed some things dealt with in the fifth meditation, he showed this "epilinguistic" use of Latin compared to French, which we have just talked about: ...

A more subconscious, self-imposed, form of metalanguage, determining the form in which a message will be uttered.

Gombert begins the volume by presenting evidence that in addition to explicit teaching of basic decoding skills, metalinguistic knowledge or epilanguage that children bring into reading is also important.

2006 Che Kan Leong, "Making explicit children’s implicit epilanguage in learning to read Chinese," in P. Li, H.T. Li, E. Bates & O.J.L. Tzeng (eds.), The Handbook of East Asian psychology, pp. 70-80. Cambridge: Cambridge University Press. In making explicit their implicit knowledge of epilanguage within a developmental context, children continually restructure their internal representation of language in order to integrate isolated procedures into a system (Karmiloff-Smith, 1986).