I'm not sure where you're getting the numbers from; there are over 200,000 lexemes in Wikidata, with roughly a dozen languages having at least thousands of entries. Obviously it's incomplete, but quite a lot of effort has gone into it already. For most nouns, a sense can be linked to a regular Wikidata item that is about a particular concept (and this has been done in at least several languages for 10's of thousands of cases now, but again much more work is needed). One helper tool available to link lexeme senses and regular conceptual (language-independent) items is MachtSinn:
https://machtsinn.toolforge.org/ - pick a language you know and help out!