Polylang adds a new menu in the admin bar which allows you to filter the content by language (posts, pages, media, categories, tags, comments, string translations). BUT NOT WIDGETS (though you can recognize widgets language on website, but not in admin site). Unfortunatelly. How can I make dissapear widgets in admin site if they don't belong to selected language (showing only on selected language and show all languages options)? This would help organize widgets a lot.