Language Subtag Registration

[Mark Davis ☕️]

On Thu, Oct 15, 2015 at 11:12 PM, Peter Constable <petercon at microsoft.com>
wrote:

> A problem with using the "u" extension is that it's only usable in
> protocols and applications that support the "u" extension, but not by BCP
> 47 implementations generally.
>

​The same is actually true of variants; many implementations don't support
those.​

Mark
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