I feel like we should first describe what #+LANGUAGE keyword does and
go into the gory details of LaTeX language support a bit later.

Basically, I am asking you to reshuffle paragraphs a bit possibly moving
some parts to more relevant 13.10.3 LaTeX header and sectioning
structure. People have no idea about #+LATEX_HEADER when reading 13.10.2
LaTeX specific export settings (coming before the 13.10.3).

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Ihor Radchenko,
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