LANGUAGE SUBTAG REGISTRATION FORM: Slovene

[Phillips, Addison]

> 
> I don't think this is within our scope. ISO 639 can add such a synonym, can they
> not?
> I don't want to get into the business of adding such synonyms. There are a
> zillion of them.
> 

It's permitted, but RFC 5646 tries hard to discourage such registrations for the reason you cite. In particular, the RFC says:

--
Attempts to provide translations or transcriptions of entries in the
   registry (which, by definition, provide no new information) are
   unlikely to be approved.
--

[Admittedly, this isn't a translation, but it doesn't seem to me to rise to the level of "adding new information" necessary to disambiguate the subtag.]

Addison

Addison Phillips
Globalization Architect (Lab126)
Chair (W3C I18N WG)

Internationalization is not a feature.
It is an architecture.