It would be nice to add posibility to redefine Yii messages by placing <yii>/framework/messages/<lang>/Yii.php (and other messages files) to <project>/protected/messages/<lang>/Yii.php
Maby Yii propose some posibilities to define project-specific version of system messages?
Posibility to define theme-specific messages would be very useful too.
Is this what you are looking for?
Ooooh, thanx! It’s right that I need.