How to prohibit accessing views in the wrong lange?

Hello,

I've got a D7 (for testing a fresh one) with:
Views, i18n, l10n_update, ctools
and activated
Multilingual content, Path Translation, Translation Sets as well as Views and Views UI

Now I installed a 2nd language (EN and DE now) and made my basic page translatable.
Created the node Test EN and translated it into Test Translated DE.

Now I created my view which displays basic pages only. And added two displays:
1. testview_en (path) with the filter en and
2. testview_de (path) with the filter de

testview_en displays my Test EN node correct.
de/testview_de displays my Test Translated DE node correct.

But
de/testview_en displays my Test EN node which should not happen.
And en/testview_de displays my DE node which is wrong as well.
(those two paths should now even exist)

Then I created a translation set with the two paths so that Drupal would know in the Language Dropdown where to change to.
But the de/testview_en problem persists.

I do not want to create redirects (we've got a page with 17 languages and way more views - not possible to manage that manually)
I do not want to add a PHP filter to each view and suppress it according to the language or similar (we just try to get rid of the PHP filter)

Is there a function hidden that I just didn't find or is this really impossible with Views?