You can edit the locales.dat file to change the default language or character set for a platform, or to add new associations between platform locale names and SAP language and character set names.
locale = platform_locale, syb_language, syb_charset
platform_locale is the platform-specific keyword for a locale. For acceptable values, see your operating system documentation.
When the locale being defined as the default for the site, platform_locale is “default.”
syb_language is the name of the language directory to be used from within $SYBASE/locales/language_name.
syb_charset is the character set that determines the character set conversion method and identifies the directory location of the message files for clients from within $SYBASE/locales/language_name/charset_name.
locale = default, us_english, iso_1