\documentclass[a4paper,12pt]{memoir}
\usepackage{fontspec}
\usepackage{longtable}
\usepackage[landscape,margin=2cm]{geometry}
%\RequireXeTeX

\newfontfamily{\en}[Script=Latin]{FreeSerif}
\setmainfont[Script=Latin]{FreeSerif}
%sanskrit MONO
\newfontfamily{\skmono}[Script=deva,
]{FreeMono}
%sanskrit SANS
\newfontfamily{\sksans}[Script=deva,
UprightFeatures={Language=Sanskrit},
BoldFeatures={Language=Sanskrit},
]{FreeSans}
%sanskrit
\newfontfamily{\sk}[Script=deva,
UprightFeatures={Language=Sanskrit},
BoldFeatures={Language=Sanskrit},
]{FreeSerif}
%oldhindi
\newfontfamily{\oh}[Script=Devanagari,Language=Default,
	UprightFeatures={RawFeature={+hlig},Ligatures=Historic},
BoldFeatures={Ligatures=Historic},
]{FreeSerif}
%hindi/marathi
\newfontfamily{\hi}[Script=deva,Language=Default]{FreeSerif}
%bombay styleset
\newfontfamily{\bby}[
UprightFeatures={Script=Devanagari,Language=Default,StylisticSet={02}},
BoldFeatures={Script=Devanagari,Language=Default,StylisticSet=2}
]{FreeSerif}
%calcutta styleset
\newfontfamily{\clt}[
UprightFeatures={Script=Devanagari,Language=Default,StylisticSet=3},
BoldFeatures={Script=Devanagari,Language=Default,StylisticSet=3}
]{FreeSerif}
%nepali styleset
\newfontfamily{\npl}[
UprightFeatures={Script=Devanagari,Language=Default,StylisticSet=4},
BoldFeatures={Script=Devanagari,Language=Default,StylisticSet=4}
]{FreeSerif}
\newfontfamily{\sGargi}[Script=Devanagari,Language=Default]{Gargi}
%%
\begin{document}
\pagestyle{ruled}



Sanskrit

\sk{
\begin{tabular}{p{4em}|p{4em}|p{4em}|p{4em}}
र ् ऋ \newline 
र्ऋ  &
र ् ॠ\newline 
र्ॠ  &
र ् ऌ\newline 
र्ऌ &
र ् ॡ\newline 
र्ॡ 
\\
\hline

र ृ\newline 
रृ  &
र ॄ\newline 
रॄ  &
र ॢ\newline 
रॢ  &
र ॣ\newline 
रॣ  

\end{tabular}
}



Hindi

\hi{
\begin{tabular}{p{4em}|p{4em}|p{4em}|p{4em}}
र ् ऋ \newline 
र्ऋ  &
र ् ॠ\newline 
र्ॠ  &
र ् ऌ\newline 
र्ऌ &
र ् ॡ\newline 
र्ॡ 
\\
\hline

र ृ\newline 
रृ  &
र ॄ\newline 
रॄ  &
र ॢ\newline 
रॢ  &
र ॣ\newline 
रॣ  

\end{tabular}
}

\end{document}
