The Elasticsearch analyzer performs the analysis process of the search database.
The Maraha system uses the built-in mahara_analyzer.
Read the Elasticsearch instructions if you wish to use a different analyzer.
This setting cannot be changed through the web interface. You may change it by setting a value in your config.php file for the following config variable:
$cfg->plugin->search->elasticsearch->analyzer.
It is recommended that you don't change the default "mahara_analyzer" unless you know what you are doing.