\fontspec[Language=Hindi,Script=Devanagari]{FontName}
\fontspec[Language=Sanskrit,Script=Devanagari]{FontName}
\fontspec[Language=Sanskrit,Script=LatinScript]{FontName}
\fontspec[Language=Sanskrit,Script=Sarada]{FontName}
\fontspec[Language=Sanskrit,Script=Grantha]{FontName}
\fontspec[Language=Sanskrit,Script=BanglaLipi]{FontName}
* Saying \selectlanguage{sanskrit} isn't going to be any use in my
document, because "{Sanskrit}" could be any of several scripts.
Yes, I understand your point. Different language/script pairs
will be treated like separate languages, much like bcp47 and the
CLDR do - eg, sa-Deva, sa-Gran, and so on. What "sanskrit" (as babel
language) means should be user definable.
"Bangla" and "Latin" are awkward, like "Arabic," because they're the
names of both a language and a script. "Bangla lipi" just means
"Bengali writing," and is what Bengalis say when they specifically refer
to the script.
Script names will be visible only when necessary and in specific
contexts, like \setbabelfont[*devanagari] (here * meaning a script;
tentative syntax). I think
\fontspec[Language=Latin,Script=Latin]{FontName}
poses no problem at all.
Javier
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