|Global object: $wgContLang|
The content language object is the Language object associated with the wiki being viewed. It is one of two global language objects ($wgLang is the other). Language objects represent the language used for incidental text, and also has some character encoding functions and other locale stuff. The language is defined in $wgLanguageCode.
Note: If you are outputting text that might be included in an interface message, you may want to use $parser->getFunctionLang() instead of $wgContLang since this will localize to the user's interface language within interface messages, but localize to the wiki content language otherwise.
Often used Methods 
This is not an exhaustive list, view class above to see a complete listing.
$wgContLang->getNsText ( $index )
- Get a namespace value by key in the current language. Examples:
$wgContLang->getNsText( NS_MEDIAWIKI );returns 'MediaWiki',
$wgContLang->getNsText( NS_CATEGORY )returns
$wgContLang->specialPage( $name )
- Get a localized special page name by the English term. Example:
$wgContLang->specialPage( 'upload' )returns
$wgContLang->convert( $text, $isTitle = false)
- Not implemented. Convert text to different variants of a language.
$wgContLang->formatSize ( $size )
- Format a size in bytes for output, using an appropriate unit (B, KB, MB or GB) according to the magnitude in question
$wgContLang->formatTimePeriod( $seconds )
- Format a time in seconds for output, using an appropriate unit (seconds, minutes, hours or days) according to the magnitude in question