\documentclass[12pt,a4paper]{article}

\usepackage{polyglossia}
\setmainlanguage[numerals=maghrib]{arabic}
\setotherlanguage{english}

\newfontfamily\arabicfont[Script=Arabic,Scale=1.2,AutoFakeSlant=-0.02]{Traditional Arabic}
\setmonofont{DejaVu Sans Mono}
\let\arabicfonttt\ttfamily
\setsansfont[Script=Arabic,Scale=1.5]{Traditional Arabic}
\begin{document}

\begin{english}
\begin{verbatim}
The command \LaTeX prints the Latex logo.

أمر
\LaTeX
يعطي لوجو لاتخ
\end{verbatim}
\end{english}
\end{document}