I have been looking at how the HTML lang attribute is exposed in acc APIs
in IA2/APK it is exposed by the 'language' text-attribute object
in OSX AX it is exposed via the AXLanguage property
So Firefox on windows/linux does expose
Safari on OSX does (and presumably iOS)
IE/Edge does not
Chrome does not
the implementation details for chrome are clear, but not for IE/Edge
Does UIA expose the lang attribute?
note:
I have filed a bug on chrome/OSX as it doesn't expose lang currently
https://code.google.com/p/chromium/issues/detail?id=484228
It does not expose on windows either, but have learned that implementation
of Ia2 text attributes in chrome is going to happen
https://groups.google.com/a/chromium.org/forum/#!topic/chromium-accessibility/YTlaYKzaiXc
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Regards
SteveF
HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>