From Joomla! Documentation
The "API15" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
|createLanguageList||Builds a list of the system languages which can be used in a select option|
|detectLanguage||Tries to detect the language|
jimport( 'joomla.language.helper' );