Add Likely Subtags first step

[John Cowan]

Mark Davis ☕️ scripsit:

> I have a slight preference for "oxford", which just looks cleaner. The
> Prefix would be en anyway, which would disambiguate.

How would "en-(gb-)oxford" differentiate between 'OED orthography' and
'variety spoken in the city of Oxford'?

-- 
John Cowan          http://www.ccil.org/~cowan        cowan at ccil.org
Income tax, if I may be pardoned for saying so, is a tax on income.
                --Lord Macnaghten (1901)