Localization is concerned with the adaptation of software so it can be used in different locales. A locale is linked to a region where certain cultural aspects apply, such as, language, formatting of dates and times, calendric representation, and so on.
As Moodle is used throughout the world and given the fact many educational establishments spawn across continents, it is important that localization is fully supported. The key areas in which Moodle can be configured are language-related settings and calendric information.
If your main language is something other than English, make sure you select this during installation. That way, locale settings as well as role names and descriptions will be localized.
Moodle supports over ...