%% 
%%  Ein Beispiel der DANTE-Edition
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%%  1. Auflage
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%%  Beispiel 03-07-12 auf Seite 91.
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%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
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\documentclass[]{exaarticle2}
\pagestyle{empty}
\setlength\textwidth{166.324pt}
\usepackage{fontspec}
\setmainfont{Linux Libertine O}
\setlength{\parindent}{0em}
\StartShownPreambleCommands
\usepackage{polyglossia}
\setmainlanguage{french}
\usepackage[autostyle,german=guillemets,
  french=guillemets]{csquotes}
\DeclareQuoteStyle{francaise}
  {\guillemotleft}{\guillemotright}%
  {\guilsinglleft}{\guilsinglright}
\StopShownPreambleCommands
\begin{document}
Il demande: \enquote{Avez-vu lu de Grass'
  \enquote{Le Tambour}?}\par
\setquotestyle{francaise}
Il demande: \enquote{Avez-vu lu de Grass'
  \enquote{Le Tambour}?}
Il demande: «Avez-vu lu de Grass'
  «Le Tambour»?»
\end{document}