you about using something like

requires="plg_system_languagefilter"
requires="plg_system_languagefilter[item_associations:1]"
requires="plg_content_vote"
requires="com_banners"

And them in that line check if the component/plugin, etc is installed, enabled and user has acess level view right to it? If yes shown the option, if not don't show it.

if ok i can work on that

We need to preserve B/C tough

Looks fine to me.

We need to preserve B/C tough

Since the value's converted to an array, first thing I can think of is do this:

foreach ($requires as $require) {
    switch ($require) {
        case 'multilanguage':
            // Do existing stuff
            break;
        case 'associations':
            // Do existing stuff
            break;
        default:
            // Do new stuff
            break;
    }
}

just waht i was doing right now ;)

please test #12518

Closing as we have a PR