To change interface language click on the profile icon in the right corner of the menu and then My profile. Select a language from the Language dropdown.
You can also change the language by simply logging out of your Voog account first, and then proceeding to the log in page at http://voog.com/#login.
Our available interface languages are listed in the upper-right side of the log in page. Select your preferred language and log back in to your Voog site, and it will be saved automatically as your default language.