--locale=lang_country

Where:

Use this option in combination with --multibyte_chars.

The locale name might be case-sensitive, depending on the host platform.

The permitted settings of locale are determined by the host platform.

Ensure that you have installed the appropriate locale support for the host platform.

To compile Japanese source files on an English-based Windows workstation, use:

--multibyte_chars --locale=japanese

and on a UNIX workstation use:

--multibyte_chars --locale=ja_JP