If the menu bar displayed in your custom report or in any other sap screen is like the image above, try deleting the language specific run time objects (Load).
To delete language specific run time objects execute the report RSLANG20.This resets the language buffers and reloads them from the database.
To access certain information more quickly, the SAP System
optimizes the information in database tables and internal buffers.
This information must be deleted after a language import or
supplementation.The language transport tools delete the language load automatically
after completing an import or supplementation action. However, database
locks may prevent the load from being deleted. This report enables you
to delete the load manually in this case.
This report does not cause errors in the system and can be restarted at
any time. However, you may experience a short drop in performance after
starting the report.
Use the check boxes to select which load types you want to delete.
To delete a language-specific load, you must enter a target language.
You also have the option of deleting the load for all languages
installed in the system.
For more information, you can check the source code of the program or see SAP Note 110910.