how to reproduce

• go to the demo : https://demo.ametys.org/nightly-intranet-cms/intranet/index.html
• create two new agent files.
  One with the first name Mathieu and one with the first name Matthieu
• Type the word Mathieu with a single 'T' : https://demo.ametys.org/nightly-intranet-cms/preview/intranet/fr/mon-organisation/annuaire.html#nav

In the search result we find Mathieu with a single T, however it would be nice to find Matthieu with two "TT"

Another example: Géral, we would like to find Geraldine, Gérald, Géraldine...

If it is possible to take into account singular, plural or feminine keywords example: document -> documents