How To Fix CU310 - Language key & not defined (check your entry)

SAP Error Message - Details

• Message type: E = Error

• Message class: CU - Variants / configuration messages

• Message number: 310

• Message text: Language key & not defined (check your entry)

What causes this issue?

Language keys are defined in table T002. The key you entered is not
defined in this table.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Display the possible entries for the language key.
If a new key needs to be defined, contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CU310 - Language key & not defined (check your entry) ?

  The SAP error message CU310 "Language key & not defined (check your entry)" typically occurs when the system encounters a language key that is not recognized or defined in the system. This can happen in various contexts, such as when creating or modifying texts, translations, or other language-dependent data.
  Cause:
  
  Undefined Language Key: The language key you are trying to use is not defined in the SAP system. This could be due to a typo or because the language has not been installed or activated in the system.
  Configuration Issues: The language settings in the system may not be properly configured, leading to the system not recognizing the specified language key.
  Missing Language Packs: The necessary language packs may not be installed in the SAP system.
  
  Solution:
  
  Check Language Key: Verify that the language key you are using is correct. Common language keys include 'EN' for English, 'DE' for German, etc. Ensure there are no typos.
  Define Language in SAP:
  
  Go to transaction code SMLT (Language Transport) to check if the language is defined in the system.
  If the language is not defined, you may need to add it using transaction SMLT or consult with your SAP Basis team to install the necessary language pack.
  
  
  Install Language Packs: If the language is not installed, you may need to install the relevant language pack. This typically requires administrative access and may involve downloading the language pack from SAP and installing it.
  Check User Settings: Ensure that the user profile settings allow for the use of the specified language. You can check this in transaction SU01 (User Maintenance) under the "Defaults" tab.
  Consult Documentation: If the issue persists, refer to SAP documentation or support for further troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: 
  
  SMLT: Language Transport
  SU01: User Maintenance
  SE63: Translation Tools
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to language settings.
  User Roles: Ensure that the user has the necessary roles and authorizations to access and modify language-dependent data.
  
  If you continue to experience issues after following these steps, it may be beneficial to reach out to your SAP support team or consult SAP's official support channels for further assistance.