query: select distinct (?l1 as ?item) (concat(replace(str(?l1),str(wd:),"{{L|"),"}}") as ?l_) {
    ?l1 dct:language wd:Q188;
       p:P8376 ?s1;
       wikibase:lemma ?lemma.
    ?s1 ps:P8376 ?id.
    ?l2 wdt:P8376 ?id.
    filter (?l1 != ?l2).
    filter not exists { ?s1 pq:P9531 ?l2 }
  } order by ?lemma