Re: allowing an @modifier for documentlanguage locale-based argument

> From: Gavin Smith <[email protected]>
> Date: Sat, 11 Apr 2026 20:03:06 +0100
> Cc: Patrice Dumas <[email protected]>, [email protected]
> 
> One question remains, and that is what to do with the contradictory
> alphabets used for the current Serbian translations.  As po/sr.po and
> po_document/sr.po are currently Cyrillic, and those files are more updated
> (due to being translated through the Translation Project), I would guess
> that if we had to choose, that "@documentlanguage sr" should use the
> Cyrillic alphabet, and "@documentlanguage sr@latin" should use the Latin
> alphabet.  So perhaps txi-sr.tex should be renamed [email protected].

AFAIU, the Cyrillic script is the official script for Serbian, so
indeed the default for sr should be Cyrillic.  Similarly for other
such languages: one script is always the default, sometimes derived
from official documents and sometimes a de-facto standard.  And in
those cases where there's no standard, both designators should have
the modifier to indicate the script they use.