Accessibility problems

Here is a patch.

This will need a bit more work around language block support. Two problems there:

1. Default language block is using div with a role="navigation". We should convert this to nav element.

2. Dropdown implementation is using h6 for Language string. This is wrong and will break page outline structure. We need to convert this to regular label with aria-labelledby.

New patch.

> 1. Default language block is using div with a role="navigation". We should convert this to nav element.

This is a bit dificult with current templates. Decided not to do it for now because this div role="navigation" should be the same as using nav element.

> 2. Dropdown implementation is using h6 for Language string.

This is fixed.

Additionally for regular language block links (not dropdown) i've discovered additional html validation problems with using hreflang attribute on li instead on a element. This problems are coming from core and there is already a long standing issue for this in 🐛 Attribute hreflang not allowed on element li at this point Needs review . Applying just a code part patch from https://www.drupal.org/project/drupal/issues/2454289#comment-15225385 🐛 Attribute hreflang not allowed on element li at this point Needs review seems to fix this nicely.

Recompiled CSS.

Committed.

Automatically closed - issue fixed for 2 weeks with no activity.