IKJEFLD1 can return a primary language that is stored in the UPT and is used for displaying translated information. IKJEFLD1 must set the Primary Language bit on if it returns a primary language. The value specified must be a three-character language code defined to the MVS™ message service. Logon processing does not check that the three-character language code is defined.

The logon processor does not pass a value to the exit for this parameter. To provide a value, specify a key of 1, a length of 3, and the language code as immediate data.

For more information about language support and the tasks necessary to implement language support, see Customizing TSO/E for different languages.