You can easily change the interface language of your Kaspersky Lab product to English and to its initial language.
In order to change the current interface language of your Kaspersky Lab product, perform the following actions:
open the main application window
press the key combination Shift + F12 on the keyboard.
Once you perform the actions described above, the product interface laguage will be changed to English.
In order to change the interface language to its initial language, perform the following actions:
open the main application window
press the key combination Shift + F5.
Once you perform the actions described above, the product interface language will be changed to its initial language.
Check here -
http://support.kaspersky.com/kav2012/tech?qid=208282536