I've found a solution on that problem - i guess it's not intended by the module creator, but it works fine for us.

In the frontend_fetchentry-hook i just modified

if (!empty($this->lang_display)) {
// If lang_display is set - we want ONLY the entries which have translation
$eventData['and ...

Hello,

actually i'm working in trying to get the multilingual-Plugin only showing entrys that are translated in english when english language is selected (so hiding those, that are not translated).
I could just filter in the event-file those entrys that are avaible in english, but that would show ...