Solution : https://service.sap.com/sap/support/notes/789121 (SAP Service marketplace login required)
Key words :
single-character internal language id, internal language id, incorrect logon language, logon language reason, edited logon data, -character id, language id, logon language, logon data, logon occurs
Related Notes :
| 811017 | XI 30 Support Package Stack 11 |
| 787931 | XI 30 Support Package Stack 10 |