See bug 146012 for the @aria-current feature implementation, and search the source for AXLanguage and NSAccessibilityLanguageAttribute to see how a similar property would be exposed.
<rdar://problem/25226902>
Created attachment 274377 [details] patch Can't believe we slipped through this.
Comment on attachment 274377 [details] patch Clearing flags on attachment: 274377 Committed r198427: <http://trac.webkit.org/changeset/198427>
All reviewed patches have been landed. Closing bug.