Yes, you can create versions of your store templates, product descriptions, etc. in multiple languages and visitors to your website can select the language that they would like to browse your store in.
In order to add a new language to your store, click on the “localization” link on the left hand navigation bar of your store administration system, then click on the “Languages” subheading. Click the “new language” button, type in the new language information into the form on the right, and then click the “insert” button.
In order to remove a language from your store, click on the “localization” link on the left hand navigation bar of your store administration system, then click on the “Languages” subheading. Click on the language that you would like to remove and then click the “delete” link on the right hand navigation bar. To confirm the deletion of the selected language, click the “delete” button again when you are prompted to confirm.