Affing the languages code fro (Old French) and frm (Middle French) would be very useful for lexemes (who are using use the general mis code in hte meantime), especially (but not only) for building etymologies.
See current lexemes in :
- Old French https://www.wikidata.org/w/index.php?title=Special:WhatLinksHere/Q35222&namespace=146&limit=100 (78 lexemes so far)
- Middle French https://www.wikidata.org/w/index.php?title=Special%3AWhatLinksHere&target=Q1473289&namespace=146 (32 lexemes so far)
See also T181823 "Add monolingual language code fro and frm in Wikidata" accepted 3 years ago.