Solution : https://service.sap.com/sap/support/notes/81663 (SAP Service marketplace login required)
Key words : 
existing system   abap/locale_ctype  install/codepage/db/trans  install/codepage/db/non_trans  install/codepage/appl_server  tcpdb  = 1401, additional key words tcpdb, correct starting data entry, correct iso character sets, symptom system, enter customizing texts, ms windows frontends, code page sap-1100, sap code page 1401, national microsoft code
Related Notes : 
       
| 75825 | Changing the character set in the existing system | 
| 71107 | Configuration of a Hungarian system | 
| 42305 | RSCPINST (I18N configuration tool) | 
| 15023 | Initializing table TCPDB (RSCP0004) (EBCDIC) |