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_Taxonomy