No Shop articles after changing language or style

Hi, wasted days and wasted nights - according to my proposal, I installed ecommerce again, 2 times in last 2 hours. After the installation at first the shop articles are shown in the right places and categories on the frontend. As soon as I change the systemlanguage to .de (German) and /or the template to style 3 all the articles are gone and disappeared. Why????? -

Post Scriptum: In the last minutes I switched in my first installation the admin and page language back to English, the virtuemart language is automatically English again and the articles are to be seen.

Post Scriptum2: It's the changed Site language, which let's the shop articles disappear; with the changed admin language, they stiil can be seen.

Did you set Language parameter in article when you edit it?

I set language/site and the laguage/admin to GERMAN. The virtuemart switched automatically into German back-/ and frontend. The English products are not to see any more. Going back to Language/site to English, leaving admin/German the products are there again in back-/frontend. Can I adjust GERMAN as Language also somewhere else? Could you give me a hint or path??? Thks.

If you want to see article in both languages set it to all

I did. Further no Pictures/Products. You can have a look on backend of this testinstallation, if you want. Will yo? Greetings Helmer

Go you global configuration / Text Filtering tab , check is all options are set to no-filtering