[wp-trac] [WordPress Trac] #33511: Bad value for attribute lang on element html

[WordPress Trac]

#33511: Bad value for attribute lang on element html
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 Reporter:  Chouby        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  I18N          |     Version:  4.3
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by timwhitlock):

 IANA have a subtag registration process (section 3.5 of RFC 5646). Perhaps
 WordPress could submit a request to make `formal` a recognised "variant"
 type. Otherwise I am in favour of the private use extension for non-
 standard tags.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33511#comment:4>
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