We support spell-out, digits, literal-punctuation and no-punctuation as values of the 'speak' property, but these should be values for the 'speak-as' property: https://www.w3.org/TR/css3-speech/#speak https://www.w3.org/TR/css3-speech/#speak-as
<rdar://problem/30308629>
<rdar://problem/30308630>
*** This bug has been marked as a duplicate of bug 180361 ***