Initially, the locale in constituent records is set to the default site locale until the constituent selects a preferred locale from a site page or an administrator sets the preferred locale directly in the constituent record on their behalf.
The standard Constituent360 pages (such as Login/Logout, Change Password, Unsubscribe, My Account, and Tell-a-Friend) are presented with translated languages and conventions in the preferred locale. If the constituent is a recurring gift donor, their Gift Service Center pages are also viewed in their preferred locale.
You can enter locale-specific content for web content Interests (also called Interest Categories) using the locale tabs provided on the configuration/edit pages.