The content of pages double/triple itself

Hi,
My problem is that the contetn of pages double, triple… itself.
For example:
1.) I have a page in 5 languages. I fill the content of a page in english.
2.) I switch to german version and fill it. Then I switch to spanish version and fill it.
3.) Whet I switch back to english version or save the work, there appears to be all content (content of all languages filled) in each version of the page.

So, when a guest opens the english version of the page, he/she sees info in english, german, spanish etc. and the same happens in other versions of the page.

Do someone knows what’s the problem and how to solve it?

Thank You very much in advance.

-Agris-