\documentclass{article}
\usepackage{fancyvrb}
\usepackage{xepersian}
\settextfont{XB Niloofar}
\setlatintextfont{Linux Libertine}
\setdigitfont{XB Zar}
\setpersiansansfont{XB Zar}
\setpersianmonofont{XB Zar}

\DefineVerbatimEnvironment{myverbatim}{Verbatim}{commandchars=+\[\]}
\begin{document}
\begin{latin}
\begin{myverbatim}
  \newcommand\familyname{+rl[وفا خلیقی]}
\end{myverbatim}
\end{latin}
\end{document}