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HTH,

--
Emmanuel Charpentier

Le dim. 2 déc. 2018 à 21:26, <emanuel.charpentier@gmail.com> a écrit :

> Dear all,
>
> Please find enclosed a proposed patch (against master) to document the
> need for babel/polyglossia in order to honor #+language in LaTeX
> export.
>
> This is purely a documentation patch. A better solution would be to
> detect the use of a non-default #+language: and act accordingly.
> Nicolas notes (rightly) that babel (and polyglossia, BTW) are too
> "invasive" to be default, and is shy of auto-loading the necessary
> package(s) "automagically.
>
> I do not (yet) know how ti reconcile these imperative, hence the
> present interim atch (which should disappear if/when a better solution
> is created).
>
> HTH,
>
> --
> Emmanuel Charpentier
>
>
> Le jeudi 29 novembre 2018 à 20:12 +0100, Nicolas Goaziou a écrit :
> > Emmanuel Charpentier <emanuel.charpentier@gmail.com> writes:
> >
> > > This is *not* *documented* (not even in the `org-latex-packages-
> > > alist''s
> > > docstring).
> >
> > I know. I fixed `org-latex-packages-alist''s docstring two days ago.
> >
> > > Also agreed, with the reservation that "invasive" didn't mean the
> > > same
> > > thing in the 1980s (when the core size of computers was measured in
> > > kilobytes) and in the 2010s (the current core measurement unit is
> > > the
> > > /giga/byte...).
> >
> > Not invasive by its sheer size, but by the number of alterations it
> > generates in the LaTeX default behaviour, and the incompatibilities
> > it
> > may introduce. For example there used to be issues between frenchb
> > and
> > KOMA-Script.
> >
> > > Again, I think that the end user should *not* have to worry with
> > > this only
> > > when exporting to LaTeX (or beamer or PDF).
> >
> > Ideally, that would be nice.
> >
> > > If this can be handled silently when exporting to ODT, HTML or
> > > plain
> > > text, it should be handled silently when exporting to LaTeX.
> >
> > I disagree. Packages should not be loaded /silently/.
> >
> > > I do not know how to handle this. My *hunch* is that the Latex
> > > Export
> > > function generating the preamble should check for language
> >
> > It does already, in `org-latex-guess-babel-language'.
> >
> > > and if not default, add the relevant package(s) to the preamble.
> >
> > Don't. Anything that is in the header should be declared.
> >
> > We could try and see if Babel causes trouble by adding it to default
> > packages in "next" branch. I'd rather do that than inserting it
> > magically.
>