pdf 中的孟加拉语文本与 xelatex 中的源文本不同

Question

\documentclass{article}
\usepackage{multido}
\usepackage{booktabs}
\usepackage{enumitem,anyfontsize}
\usepackage[a4paper,left=0cm,top=0.7cm,bottom=0cm,right=0cm]{geometry}
\usepackage{polyglossia}
\setmainlanguage[numerals=Devanagari]{bengali}
\setmainlanguage{bengali}
\setotherlanguage{english}
%\newfontfamily\englishfont[Scale=MatchLowercase]{Linux Biolinum O}
\newfontfamily\bengalifont[Script=Bengali]{NikoshLightBAN}
\begin{document}
\centering
\multido{}{2}
{{\fontsize{71}{85.2} \selectfont \selectlanguage{english} AL DHAFRA \selectlanguage{bengali} ব্রান্ডের প্যাকেটজাত \selectlanguage{english} DABBAS \selectlanguage{bengali} খেজুর এবং মধু পাওয়া যায়\\}{\fontsize{52}{62.4}\selectfont মোবাঃ \selectlanguage{english}01515611989\\ \selectlanguage{bengali} রুম -\selectlanguage{english} 1406, \selectlanguage{english}Ex-1, \selectlanguage{bengali}শহীদুল্লাহ হল\\}\vspace{1.4cm}}
\end{document}

输出