id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
20291,"html element ""lang"" bug",ricardojvcruz,ricardojvcruz,"Wordpress core function ""language_attributes()"" is returning by example 'en_US' and should return 'en-US'.
This could be important when crawlers are parsing and indexing pages saving the parsed language found in that element.

Following w3c specification of html language attribute we can confirm that.

HTML 4.0 lang spec:
http://www.w3.org/TR/html4/struct/dirlang.html

HTML 4.1 lang spec:
http://www.w3.org/TR/html401/struct/dirlang.html#adef-lang

HTML 5 lang spec:
http://dev.w3.org/html5/html-author/#the-html-element",defect (bug),closed,normal,,I18N,3.3.1,normal,invalid,has-patch,info@…