Message type: E = Error
Message class:  STRALAN_MSAG - Language Transport Messages 
Message number: 123
Message text: You have no authorization to supplement a language
You need the following authorization to execute this action:
Object: ,,<ZH>S_CTS_LANG</>
ID: ,,,,<ZH>CTS_LANFKT</>
Field: ,,,,<ZH>SUPL</>
The function terminates.
Contact the system administrator, who can then give you the appropriate
authorization or role.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message STRALAN_MSAG123, which states "You have no authorization to supplement a language," typically occurs when a user attempts to add or modify language settings in the SAP system but lacks the necessary authorizations to perform that action.
Cause: Authorization Issues: The user does not have the required authorization objects to perform language-related activities. This could be due to missing roles or permissions in their user profile. System Configuration: The system may be configured in such a way that only certain users (like administrators) can add or modify languages. User Role Assignment: The user may not be assigned to the correct roles that include language management capabilities.
Solution: Check User Authorizations: Use transaction code SU53 immediately after encountering the error to check which authorization checks failed. This will provide insight into what specific authorizations are missing. Review the user’s roles and authorizations in transaction code SU01 (User Maintenance) or PFCG (Role Maintenance). Modify User Roles: If you have
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
STRALAN_MSAG122 You have no authorization to import a language
What causes this issue?  You need the following authorization to execute this action: Object: ,,<ZH>S_CTS_LANG</> ID: ,,,,<ZH>CTS_LA...
STRALAN_MSAG121 You have no authorization to change the language data
What causes this issue?  You need the following authorization to execute this action: Object: ,,<ZH>S_CTS_LANG</> ID: ,,,,<ZH>CTS_LA...
STRALAN_MSAG124 You do not have language administration authorization
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
STRALAN_MSAG130 Feedback routine for request &
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.