Source needed before labeling 'proscribed'

This definition says

(nonstandard, proscribed)

The Appendix definition for [[Appendix:Glossary#proscribed|proscribed] says

Some educators or other authorities recommend against the listed usage. Labeling entries as proscribed is proscribed: some educators recommend against the labeling.

Before labelling a definition as proscribed, a sources is needed from an educator or other authority who recommends against its use. Yolojolo14 (talk) 18:13, 28 January 2019 (UTC)Reply