Re: Sanskrit/Devanagari fonts not exported to org-pdf output

[Juan Manuel Macías]

Hi, Zenny,

Zenny writes:

> Where does this preamble goes to? Any example?

As in your example, using latex_header keywords (replacing the
polyglossia code with the babel code):

#+LaTeX_Header: \usepackage[english]{babel}
#+LaTeX_Header: \usepackage{fontspec}
#+LaTeX_Header: \newfontscript{Devanagari}{deva}
#+LaTeX_Header: \babelprovide[onchar=ids fonts]{sanskrit-devanagari}
#+LaTeX_Header: \babelfont[sanskrit-devanagari]{rm}{Noto Sans Devanagari}

> Yet I am a bit confused because the Sanskrit/Devanagari words are used
> not in a whole block, but in between English sentences, eg.:

With Polyglossia and babel it is necessary to enter a command that
changes the language. In the case of polyglossia, if you don't
explicitly switch to Sanskrit the font you declared for Sanskrit is not
used, and LaTeX still thinks the text is English. Polyglossia uses some
commands similar to those of babel (\selectlanguage, for long texts) and
other native ones, such as \text<lang>{text}, where <lang> is the
secondary language. In babel you have the command
\foreignlanguage{<lang>}{text}. For example (using polyglossia):

Old expression goes like \textsanskrit{स्वस्ति सत्यं वचति}

Of course, in org you would have to use some trick, like defining some
macro (since org does not have, at the moment[1], a native language
switching method):

#+macro: sanskrit @@latex:\textsanskrit{@@$1@@latex:}@@

Old expression goes like {{{sanskrit(स्वस्ति सत्यं वचति)}}}

With LuaLaTeX, babel can associate a non latin language to a font
without requiring an explicit language switch:

#+LaTeX_Header: \usepackage[english]{babel}
#+LaTeX_Header: \usepackage{fontspec}
#+LaTeX_Header: \newfontscript{Devanagari}{deva}
#+LaTeX_Header: \babelprovide[onchar=ids fonts]{sanskrit-devanagari}
#+LaTeX_Header: \babelfont[sanskrit-devanagari]{rm}{Noto Sans Devanagari}

Old expression goes like स्वस्ति सत्यं वचति

[1] You might be interested in this thread: 
https://list.orgmode.org/878r9t7x7y.fsf@posteo.net/