A Locale Bundle is a set of properties used in localizing the displayed content in Data Sources, rendering the text in Sets, Items, and Messages into different languages depending on the specified location of the user.
When a user's operating environment specifies a specific location, the server looks for the corresponding Locale Bundle and displays the text it contains. This localized text will appear in the Ad Hoc Designer and the Report Viewer for any View or Report based on the Data Source containing the Locale Bundle.