I have texlive on windows with installed, all packages relating to sanskrit and hindi. there is no error with xelatex.
when I compile, with lualatex, the simple document, I obtain an error in gloss-sanskrit.ldf
Undefined control sequence. \newXeTeXintercharclass
Undefined control sequence. \newXeTeXintercharclass\sanskrit@punctthin
the whole log
Undefined control sequence. \newXeTeXintercharclass
Undefined control sequence. \newXeTeXintercharclass\sanskrit@punctthin
Undefined control sequence. \select@language {sanskrit}
Missing \begin{document}. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Missing $ inserted. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Undefined control sequence. \select@language {sanskrit}
Missing number, treated as zero. \select@language {sanskrit}
Illegal unit of measure (pt inserted). \select@language {sanskrit}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Undefined control sequence. \select@language {english}
Command \rmfamily invalid in math mode. \select@language {english}
Missing $ inserted. \begin{document}
fontspec warning: "only-xetex-feature" Ignored XeTeX only feature: 'Renderer=AAT/OpenType/Graphite'.
fontspec warning: "no-mapping" Input mapping not (yet?) supported in LuaTeX.
fontspec warning: "no-mapping" Input mapping not (yet?) supported in LuaTeX.
Hindi is not supported with LuaTeX.
Overfull \hbox (5.5174pt too wide) in paragraph
my document
\documentclass[oneside,a4paper, 12pt]{article}
\tracinglostchars=2
\usepackage{polyglossia}
\usepackage{fontspec}
%\setmainfont[Numbers=Lining]{Brill}
\setmainfont{CharisSIL}
\setsansfont{Lato}
\newfontfamily\sanskritfont[Script=Devanagari]{Nakula}
\newfontfamily\devanagarifont[Script=Devanagari,Mapping=harvardkyoto]{Sanskrit 2003}
%\newfontfamily\sanskritfont[Script=Devanagari,Mapping=harvardkyoto]{Sanskrit 2003}
\setdefaultlanguage{english}
\setotherlanguage{hindi}
\setotherlanguage{sanskrit}
\begin{document}
Here's some text in the default font,
Charis, and {\sanskritfont
अत्र देवनागरीलिप्युदाहरणम् वर्तते| \par}
\begin{sanskrit}
गरीलिप्युदा हरणम्
\end{sanskrit}
\begin{hindi}
गरीलिप्युदा हरणम्
\end{hindi}
\end{document}
