Solution : https://service.sap.com/sap/support/notes/92439 (SAP Service marketplace login required)
Key words :
additional key words ie01, 'set local language' command, individual runtime errors, runtime error textenv_key_invalid, multilingual short texts, runtime error textenv_language_not_allowed, runtime errors, character set, runtime error, error textenv_language_not_allowed
Related Notes :
| 89958 | Equipm. short text: update termination when saving |
| 83196 | TEXTENV_CODEPAGE_ / _LANGUAGE_NOT_ALLOWED |