[basex-talk] Stemming and Italian

Dear all, as stated in the documentation for fulltext, since I have lucene-3.4.0 jar file in the lib directory of BaseX (and thus in its classpath which is java -cp [...]/basex/BaseX.jar:[...]/basex/lib/custom/*:[...]/basex/lib/*: -Xmx2g org.basex.BaseXGUI) I was expecting the following query to return true() "cammina" contains text "camminare" any word using stemming using language "it" (: tried also with Italian:) But I always get false() with any combination whereas it works neatly with embedded English and German. Ho can I understand if stemming is actually used and in case with what language. Thanks for your support, Marco.