Joomla! Discussion Forums

I'm sorry because probably someone has already asked this thing, but i couldn't find any answer to my problem, even in the italian joomla/joomfish forum.

I've got this problem: i've installed the joomfish component and italian and english languages in the /languages joomla directory. I've published the joomfish language selection component for selecting the global language and i traslated my contents.

The problem is that when i select a duifferent language in the list of available languages, all the content's i have translated is correctly shown in the right language, but anything change with all the joomla own content, such as the labels and the links stricktly connected with the joomla sftware.

Where is the problem? Can anybody explain me where i'm wrong?

Thank you all!
Mauro