smc <smc@manticore.es> writes:

> We are translating all official GNU Emacs documentation into Spanish
> for a future i18n/l10n of the program.

Wow.  Good luck!

> We are very advanced translating the Org-mode texi manual, but
> there is a @-command which we had never heard: @tsubheading.
>
> This command is not documented in the Texinfo manual and is causing
> problems in the provisional generation with texinfo-format-buffer, because
> it is not recognized.
>
> Please, can you help with some directions?

It's a macro, defined line 36 of latest org.texi file:

,----
| @c Subheadings inside a table.
| @macro tsubheading{text}
| @ifinfo
| @subsubheading \text\
| @end ifinfo
| @ifnotinfo
| @item @b{\text\}
| @end ifnotinfo
| @end macro
`----

HTH,

--
 Bastien