Manual:$wgExtraLanguageNames

Site customization: $wgExtraLanguageNames
List of language names or overrides for default names in Names.php.
Introduced in version:	1.12.0 (r28212)
Removed in version:	still in use
Allowed values:	array of strings
Default value:	array()

Other settings: Alphabetical | By Function

Details

List of language names or overrides for default names in /languages/Names.php.

$wgExtraLanguageNames['xyz'] = 'Language name';