The language selection element can't be reached when using keyboard navigation.
W3 example: https://www.w3.org/WAI/ARIA/apg/patterns/menubar/examples/menubar-navigation/
Better example: https://www.w3.org/WAI/ARIA/apg/patterns/menu-button/examples/menu-button-actions-active-descendant/
Acceptance Criteria
- The language selection can be focused using the tab key.
- Pressing the space bar expands the language selection menu.
- The cursor up/down keys can be used to highlight an option.
- The Enter and the space bar key can be used to select an option.