Glossopoeiology

Glossopoeiology (/glɒsoʊpiːjˈɒlədʒi/], from Greek γλῶσσα 'tongue, language', -ποιία 'making' and λόγος 'saying, account, explanation, narrative'; cf. glossopoeia) is the study, description and theory of conlanging as a craft art, game as well as a cultural and social phenomenon, including the artistic biography of conlangers and the historiography of conlanging and conlangs (in the sense of history of what conlangers do and of their creations in real time as opposed to the fictitious language history of diachronic conlangs in imaginary time).

Perhaps a better term would be glossopoeistics, since the referent is the study of what conlangers do, and how and why they do it.