\documentclass{article}

\usepackage{xepersian}

\settextfont[Scale=3]{XB Niloofar}

\begin{document}

\begin{latin}

This is typeset by \textsf{\XePersian} package,\xepersianversion,

\xepersiandate.

\begin{figure}[h]

\label{test}

\caption{This is a test}

\end{figure}

\end{latin}

\section{عنوان قسمت}

\end{document}