Improve display of language list in attachment meta area

[jaymcp]

Ref: [ticket number(s) here]

Steps to test:

1. [add testing steps here]

Considerations:

• Accessibility
  • Regions (semantic HTML tags, e.g. <section>; landmarks; etc.)
  • Screen reader compatibility, labels (aria-label, aria-labelledby, etc.)
  • Keyboard navigability
• Localisation
• RTL