Hello Mr. Bernard JOURDAIN,
Thank you for the kind words. We have right to left on our to-do list, but haven't had the chance to implement it yet. We have logged a PITS issue at http://www.telerik.com/support/pits.aspx#/public/silverlight/3443, which you can use to track our progress. We are considering adding this feature to our Q2 list.
Kind regards,
Iva
the Telerik team
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