Hi, I guess we still miss a datatype : the *monolingual text* datatype, which is aimed to do such tasks. The statement can the be sourced with the authority website as the (at least an) official term in the language.
A domain where the user face this problem already is the biological taxonomy project, where there is a lot of discussion about the naming of taxons for example, see https://www.wikidata.org/w/index.php?title=Wikidata_talk:WikiProject_Taxonom...
Tom²