I try to put \textsuperscript{ère} with Roman digits everywhere in document but as I understood the command \textsuperscript{} in French makes effect for all symbols except of "è"?
This solution didn't help.
Could somebody help to fix it? Here is the code:
\documentclass[12pt]{report}
\usepackage{fontspec}
\usepackage{xunicode}
\usepackage{xltxtra}
\usepackage[babel=false]{csquotes}
\usepackage{polyglossia}
\setdefaultlanguage{french}
\setotherlanguages{german,english,greek,polish,russian}
\setmainfont[Mapping=tex-text]{Linux Libertine}
\usepackage{setspace}
\newfontfamily\greekfont[Script=Greek,Mapping=tex-text]{CMU Serif}
\newfontfamily\russianfont[Script=Cyrillic,Mapping=tex-text]{CMU Serif}
\begin{document}
I\textsuperscript{ère}
\end{document}
And the result:

Thanks
\textsuperscript{\\ere}` work? – Seamus Apr 05 '11 at 15:42\textsuperscript{ère}and\textsuperscript{\\ere}` work for me... – Seamus Apr 05 '11 at 15:57unifrmrcome from? It's not in TeX Live or on CTAN. – Joseph Wright Apr 05 '11 at 18:31