Become superuser or assume an equivalent role.
Add the packages for the locale you want to install on your system using the localeadm command.
The -a option and a locale identifies the locale that you want to add. The -d option and a device identifies the device containing the locale packages you want to add. To add the Central European region (ceu) to your system, for example:
# localeadm -a ceu -d /net/install/latest/Solaris/Product locale/region name is ceu Devices are /net/install/latest/Solaris/Product . . . One or more locales have been added. To update the list of locales available at . . .