In external translation, the language for the extended console is determined by the user profile, which is set with the PLANG operand of the TSO PROFILE command.

When a language other than U.S. English is selected, the following condition occurs:

1. ISTVTMEU is used to parse the U.S. English message to determine the variable text.
2. MMS looks up the corresponding translated message and substitutes the variable text.

ISTVTMEU and ISTINCNO must match for external translation to work correctly. It is recommended that you use the IBM-supplied copies of these files and that you do not use the USSTAB start option. Customization of messages can then be accomplished by changing the language skeleton files used by MMS.