During a first execution of software, historical data is logged that indicates which locale objects were used. During a second execution of the software, the historical data is read, and locale objects or subsections of locale objects are dynamically built from locale source files based on the historical data in the log that indicates which locale objects were used during the first execution. Any other locale objects or subsections that are needed that are not built initially during the second execution are dynamically built from locale source files when requested at run-time. Dynamically building locale objects or subsections based on which locale objects were used in one or more previous executions saves time that would otherwise be required to build the locale objects when they are needed at run-time. The result is significant savings in system-wide resources while still allowing for access to a large number of possible locales.