Announce highlight instead of marked (PR #12892)
Prior work: #11436
- Use "highlight" instead of "marked content" for speech.
- Use "hlght" instead of "mrkd" for braille
'mark' elements were being reported as "marked content" which is long.
Additionally, the standard visual representation (in browsers) of mark is a yellow background, as if the text has been highlighted.
Arguably, "highlighted" is a more common phrase in English and more specific to the visual representation in browsers
The more general "marked" content could mean many different kinds of markings with varied semantics.
With the introduction of "role-description", less common usages of mark can be achieved.
