Add Likely Subtags first step

[Michael Everson]

On 24 Jan 2015, at 17:22, Mark Davis ☕️ <mark at macchiato.com> wrote:

> I would be very much in favor of deprecating all of the grandfathered codes, and if supplying preferred values. 
> 
> BCP47 says the following. Unfortunately, we used the "extended language range" instead of a language priority list, which would have made it easy. So that means we have to list the alternatives in a comment instead of having them be machine readable:
> 
> The field-body of the 'Preferred-Value' for grandfathered and
> redundant tags is an "extended language range" [
> RFC4647
> ] and
> might consist of more than one subtag.
> 
> 
> ​Of these grandfathered codes, then, the following have not been deprecated. I suggest that we deprecate each of them, and supply alternatives where possible (in the description, and for zh-min). The preferred value for en-GB-oed could use a new variant tag ("oxford"). The preferred value for i-default could be "und".
> 
> cel-gaulish
> en-GB-oed
> i-default
> i-enochian
> i-mingo

Happy to add “oxford”
What specifically would you propose for the others?

Michael Everson * http://www.evertype.com/