[XeTeX] Polyglossia and Sanskrit

[Yves Codet]

Hello.

I have a question about Sanskrit. The following preamble gives the  
expected result:

\documentclass[a4paper,12pt]{article}
\usepackage{polyglossia}
\usepackage{fontspec}
\setdefaultlanguage{french}
\setotherlanguage{sanskrit}
\setmainfont{Charis SIL}
\newfontfamily\sanskritfont[Script=Devanagari]{Sanskrit 2003}
\newcommand{\skt}[1]{{\begin{sanskrit}#1\end{sanskrit}}}
%\newcommand{\skt}[1]{\localsanskrit{#1}}

But if I use the commented out command instead of the preceding one  
Charis is used for Sanskrit and of course nothing appears in the  
ouput. Is this command wrong?

Kind regards,

Yves

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