When tabbing through new Portal input field, the language switcher does get focus and is useable by letter input or arrow keys, but there is no visual difference between focus and normal state.
Related Gerrit Patches:
|wikimedia/portals : master||Adding 'focus' feedback to language picker.|
|Resolved||debt||T130755 [EPIC] Portal Production release: bug fixes and small updates|
|Resolved||Jdrewniak||T129619 Keyboard users: Tabbing through new Portal input has no visual feedback on language switcher|