[XeTeX] various questions about ArabXeTeX

[وفا خلیقی]

what about this:

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\documentclass{article}
\usepackage{fontspec}
\usepackage{arabxetex}
\newfontfamily\arabicfont[Script=Arabic,Mapping=arabicdigits]{XB Zar}
\newfontfamily\allahfont[Script=Arabic,Scale=1.8]{Scheherazade}
\makeatletter
\def\Allah{\begingroup\allahfont\char"FDF2\endgroup}
\makeatother
\begin{document}
\Allah\ is an Arabic word.
\end{document}
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