Use command 'ctgmsgs' to list the recognized languages as the language language code is not recognized
CICS® Transaction Gateway supports a number of language and code set combinations, but the specified language code is not supported on this platform.
The message language will not be changed.
Run the 'ctgmsgs' command with the '-?' parameter to get a list of supported language and code set combinations. Choose the combination that best meets your requirements and retry with that combination.