there's nothing preventing `<audio>` from having multiple `<source>`
just like with `<video>`, we should allow `<audio>` to have a language picker
Created attachment 443042 [details]
Created attachment 443061 [details]
Created attachment 443121 [details]
Committed r285216 (243841@main): <https://commits.webkit.org/243841@main>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 443121 [details].