ISO 639-5

[Frank Ellermann]

Doug Ewell wrote:

> Then we're fine.

Certainly not, as long as language tag users don't know 
what ISO 639-5 is, and why whatever it is should confuse
the IANA registry and their applications.

Your other message was a good example.  It is plausible
that the reviewers can miss minor changes, and RFC 4646
offers a straight forward remedy for this situation:

Anybody finding discrepancies can request a fix.  That
cannot work as designed if it's about unknown standards
like ISO 639-5.  

The numeric UN region codes were already on the wrong
side of obscure, but at least I would know why they're
necessary in conjunction with "recycled" country codes.

 Frank