When i include the package \usepackage{polyglossia} the abstract disappears.I want to write Urdu language in-between English lines. Urdu appears fine but the abstarct is gone. This is my code.
\documentclass[format=acmsmall, review=false, screen=true]{acmart}
\usepackage{booktabs}
\usepackage[ruled]{algorithm2e}
\usepackage{xltxtra}
\usepackage{fontspec}
\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{urdu}
\newfontfamily\urdufont[Script=Arabic,Language=Urdu,Scale=1.5]{Jameel Noori Nastaleeq} %for writing Urdu language
\renewcommand{\algorithmcfname}{ALGORITHM}
\begin{document}
\title{Some title}
\begin{abstract}
Abstract goes here..
\end{abstract}
\keywords{Some keywords}
\maketitle
\section{Introduction}
Some text here \texturdu{اردو الفاظ} Some more text.
\end{document}
