Each user has a configured locale. This can be set for the user, or inherited from a Group.
Your Name » Users » (user name) » Localisation
Click the ‘Edit’ button and choose the locale.
To set the locale for a group,
Your Name » Groups » (group name) » Localisation
This can be useful for setting the default locale for groups of users. For example, the “Madrid Office” group may find the Spanish locale a useful default.
The user setting overrides any locale set on their group.
Set the locale of the
Everyone group to set the default locale of this application.