query: bigdata/namespace/wdq/sparql?query=PREFIX v: <http://www.wikidata.org/prop/statement/> #mandatory
  
  SELECT  ?lang ?langLabel (COUNT(DISTINCT ?item) as ?itemCount)
  WHERE
  {
  	?item p:P2919 ?file_statement .
      ?file_statement v:P2919 ?file .
      OPTIONAL { ?file_statement pq:P407 ?lang }
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }
  GROUP BY ?lang ?langLabel ORDER BY DESC(?itemCount)