The following (running) bibliography collates works in Metalinguistic NLP, including (linguistic) metalanguage. We do not update it at fixed frequency so the GitHub repository issues can be checked for things under consideration.
The paper "Speaking of Language: Reflections on Metalanguage Research in NLP" (Schneider and Anastasopoulos, 2026) provides a context for situating the bibliography.
The bibliography is maintained by Abhishek Purushothama and Prof. Nathan Schneider. Other bibliographies from the lab : AMR Bibliography & CxG+NLP bibliographies.