Duplicated nodes of thew view I created a view, that is simple page containing nodes of a specific content type.

It had worked before I started to translate nodes. 
I added a new translation for my node and now I have duplicated entries of the same node displayed on the page. 

I have solved this problem for one view with just enabling aggregation.

But with this one it doesn't work.



It outputs the same node twice. And the language is the same, but at first they have different languages.

Really, I don't understand what is going on with the translation modules, or what causes such a weird behavior. I have asked a lot of questions about translation in Drupal, and each time I try to do anything related to the translation, I get a new error. 

Maybe I am going crazy, but something terrible is happening with the Drupal translation modules. 

Please suggest how to deal with this ?
I can suggest you an alternative approach.
In your views filter area, create a new filter, based on the current user's language.

How to do it:

Views: add filter criteria -> Content: Translation language
Check the checkbox labeled "Interface text language selected for page"


Another thing, you can go to Views overview page, and then Views settings tab -> Show SQL query option.

How to do it:

Go to admin/structure/views/settings
Check this option

In this way this will always show the query that gets executed.
I suggest you copy it it here, so that the other people will have better time understanding what you want to achieve.

Notes:
The Drupal 7 site builders are used to "Currents user language" checkbox, however that checkbox has been renamed.
More information:
http://hojtsy.hu/comment/21596#comment-21596

Best regards,
Oleg