Wikidata Lexeme Forms, a tool to create and update Lexemes with the right forms on Wikidata, recently gained an edit mode (not yet documented; announcement): it matches the existing forms to the forms in the template the tool knows about (e. g. F3 must be genitive singular, etc.) and lets the user edit the representation of those forms. Currently, forms that cannot be matched (because they match zero or more than one forms in the template) are simply listed without the ability to edit them; @Vesihiisi requested a feature to manually match those forms to a template form (based on the form representation, which the user recognizes: “‘users’ is the plural form!”), and @Nikki also indicated interest, so maybe we can work on this.