| Nikki added a comment. |
My understanding of the problem is that when someone uses {{#babel:zh-classical}}, the extension puts the user into "Category:User zh-classical" instead of into "Category:User lzh" even though they mean the same thing. Instead, it should understand that zh-classical is a legacy code and convert it to lzh, to avoid duplicate categories.
All the users in https://www.wikidata.org/wiki/Category:User_be-x-old, https://www.wikidata.org/wiki/Category:User_zh-classical and https://www.wikidata.org/wiki/Category:User_zh-yue are there because they used the Babel extension with an old code. Those categories duplicate https://www.wikidata.org/wiki/Category:User_be-tarask, https://www.wikidata.org/wiki/Category:User_lzh and https://www.wikidata.org/wiki/Category:User_yue. All six pages were created by the Babel AutoCreate account (before it got blocked).
Cc: Nemo_bis, Nikerabbit, Whatamidoing-WMF, Glaisher, MarcoAurelio, StudiesWorld, Ricordisamoa, Liuxinyu970226, Nikki, Aklapper, Bugreporter, D3r1ck01, Izno, Wikidata-bugs, aude, SPQRobin, Dereckson, Arrbee, KartikMistry, Mbch331
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