Configure the NLS_LANG parameter for Oracle database
To localize your reports to a multibyte language for oracle database, you must set the NLS_LANG environment variable to the appropriate value.
For Unix or Linux,
export NLS_LANG=<language>_<territory>_AL32UTF8.
For example, export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
For Windows,
set NLS_LANG=<language>_<territory>_AL32UTF8.
For example, set NLS_LANG=AMERICAN_AMERICA.AL32UTF8