NLS_LANGUAGE

Property	Description
Parameter type	String
Syntax	`NLS_LANGUAGE =` `language`
Default value	Operating system-dependent, derived from the `NLS_LANG` environment variable
Modifiable	`ALTER SESSION`
Range of values	Any valid language name
Basic	Yes

NLS_LANGUAGE specifies the default language of the database. This language is used for messages, day and month names, symbols for AD, BC, a.m., and p.m., and the default sorting mechanism. This parameter also determines the default values of the parameters NLS_DATE_LANGUAGE and NLS_SORT.

See Also:

Oracle Database Globalization Support Guide for a complete list of languages and additional information on this parameter
Your operating system-specific Oracle documentation and the release notes for your country