Some Translations Are Not Working

Hi, i’m experiencing some problems with translations.

Even if my language is set to ‘it’, not every string in the framework language files for ‘it’ is working.

For example: i wanted to translate ‘The requested page does not exist’, but i couldn’t find the string in any translation file and adding it doesn’t seem to work.

And even ‘Are you sure you want to delete this item?’, which was already in the ‘zii.php’ language file in the ‘it’ folder, is not translated.

What’s wrong? Thanks in advance.

[EDIT] I figured out the ‘Are you sure you want to delete this item?’ is inside the views generated by Gii and ‘The requested page does not exist’ is inside the controller. Can’t those string use the standard translations? Do i have to change them manually?