\documentclass{article}
\usepackage{polyglossia}
\setmainlanguage{french}
\usepackage{fontspec,xpatch}
\usepackage[citestyle=verbose,bibstyle=realauthor]{biblatex}
\bibliography{example.bib}

\begin{document}


\cite{LeClerc1686}

\cite{Simon1686}


\end{document}
