====== Mots vides ======

  * https://fr.wikipedia.org/wiki/Mot_vide

  * https://www.ranks.nl/stopwords/french

  * http://snowball.tartarus.org/algorithms/french/stop.txt

  * http://members.unine.ch/jacques.savoy/clef/frenchST.txt
  * https://github.com/stopwords-iso/stopwords-fr