Solution : https://service.sap.com/sap/support/notes/312554 (SAP Service marketplace login required)
Key words : 
sap system installation                  20/jul/014 final installation steps5 installation check list6 troubleshooting+===================================================================+ 1, < host>_<sid>_<inst>  de_de_iso1          bad locale, topics                                        date changed======                                        ============1 general information2 installation preparations3, abap run time error          'dynpro_read_failed', final installation steps +===================================================================+-----------------------<c5015632, note 40815                    en_gb_iso1          bad locale, general information +===================================================================+----------------------------<29/jan/04>------------------------------installation, sap system installation +===================================================================+-------------------------<d025966, 6d hot package sapkb46d02, required operating system locales
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