add basic accessibility functionality

[tastafur]

adds basic accessibility functionality so that from a screen reader you can use the functionality and its translation into English and Spanish

[dmitriy1morozov]

@tastafur , please squash commits since the last 3 ones seem to override each other. Also, please review your changes to make sure that no redundant comments in the code remain. And no redundant (debugging code) remains as well. Thank you for your involvement.