Ihor Radchenko writes:

> Can you please add the comments, similar to what I requested earlier.
> These magic length of 4 may be hard to grasp otherwise.

Hi Ihor,

Here is the new patch. I have realized that it is not necessary to put a
cond, since in this case it is only necessary to obtain the name of the
language for the metadata, so this new patch is simpler.

Anyway, I think I'm going to prioritize working on a new
org-latex-language-alist that is a plist, to avoid all this stuff about
numbers and lengths...

Best regards,

Juan Manuel