Changing the language of a page should be handled by most modern browsers for most users. It can however be a little on the wonky side. Spruz sites are pretty much configured for English only for the owners point of view. To add a domain name, you must first have a paid plan for your site. From that point, you contact Spruz through a support ticket and let them know you have a domain that you want to add to your site. They will give you the proper DNS settings to get things linked up.