To display e-mail notifications in other languages
1. Determine if Oracle has translated the e-mail notification templates to the language you wish to set by checking for a file called wfmail.wft in the appropriate language subdirectory $ORACLE_HOME/wf/res/<lang>. See: Modifying Your Message Templates.
2. If the e-mail templates are available for the language you wish to display, you can set your users and roles' default language setting to that language in the Global Preferences web page. See: Setting Global User Preferences.