So, I don’t know the first thing about the Lexemes data model, but some early thoughts:

integraality has 3 parts: selection, grouping, and description

• Selection should work just fine out of the box: something like |selector_sparql=dct:language wd:Q12107 does get all Breton lexemes
• Grouping:
  • does it make any sense (no pun intended) to group by property? Are Lexemes even expected to have statements in general, or do they rather go on the Forms/Senses?
  • grouping by lexical category would need adaptation
• Description:
  • describing along Language and Lexical category probably needs a new ColumnConfig object, but should be doable.
  • describing along statements: same question, does this make much sense in general?

Joining through to Forms and Senses might be tricky

Sooo, smth like https://www.wikidata.org/wiki/User:Jean-Fr%C3%A9d%C3%A9ric/Integraality/Lexemes does return smth (no idea whether it makes any sense though ^^)

Thanks @VIGNERON for fixing the dashboard! Also made the transposed one https://www.wikidata.org/wiki/User:Jean-Fr%C3%A9d%C3%A9ric/Integraality/Lexemes_bis

For lexemes a good grouping predicate would be wikibase:lexicalCategory and dct:language