Language is used for messages, day and month names, and sorting algorithms. It also determines NLS_DATE_LANGUAGE and NLS_SORT parameter values. The default value is the NLS_LANGUAGE setting of the local computer.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2