There are two ways to control the language settings that are available for Web sites based on Windows SharePoint Services:

• Language template packs
  

Language template packs allow you to use site templates designed for specific languages. When you create a site based on a site template in a language template pack, the navigation and pages for that site are displayed in that language.

• Regional settings
  

Regional settings allow you to control how dates, times, and lists are displayed in a particular Web site. Regional settings do not control the language used for the navigation or pages in the site.