[Luxor] how to use accentuated characters

Hi All,

How may I use international and/or accentuated characters with LUXOR ?
I need it for French Translation in Tooltips and some other tags.

When using it in Label or tooltip I got an error message like this

xul error: failed to parse xul document 'buffer': org.jdom.JDOMException: 
Error on line 1 of document ASCII: Erreur de conversion de caractère : 
"Malformed UTF-8 char -- is an XML encoding declaration missing?" (le 
numéro de ligne peut être trop bas).

This error comes from luxor.core.load on line 57
         Document doc = builder.build(in);
which invoke the parser in SaxBuilder from class 
org.apache.crimson.parser.Parser2

Thanks in advance for your help

Best Regards,
Clément BOURDON