Steps:
- on mobile enwiki beta (use ?minimalMinerva=1) go to any article
- start clicking Tab to go trhough elements on a page
- the language selector is not keyboard-focusable
<div role="button" href="#p-lang" data-mw="interface" data-event-name="menu.languages" title="Language" class="cdx-info-chip cdx-info-chip--progressive language-selector mw-interlanguage-selector">
<span class="minerva-icon minerva-icon-size-small minerva-icon--language"></span>
<span class="cdx-info-chip__text">1 language</span>
</div>Expected behavior:
- Visible focus, hover, and active affordances
- Language chip is an anchor tag with button role (<a role="button">)
- Comments chip is a plain anchor tag (<a>)
- Both chips are wrapped inside a list container (<ul>/<li>)
- Language chip is keyboard accessible/focusable via key tabs
- Enter key activates the language chip/fake button and opens the language selector overlay
- Screen reader announces language chip as a button


