Not all users of the Comm Clow system will feel most comfortable using the English language. If you want to take the opportunity to install the capability for support of French and Italian languages for guest users you will have to add French and Italian languages to the community using Site.com configuration. Site.com makes it much easier to develop business websites that are easy for the developers and the users to operate and navigate.
Putting options like this into the framework will prove to make better customer service for more satisfied customers when they log onto your site as a guest and find the options they need most.