code: private function getCachedPlural($singular)
  	{
  		$singular = StringHelper::strtolower($singular);
  
  		// Check if the word is in cache.
  		if (isset($this->cache[$singular]))
  		{
  			return $this->cache[$singular];
  		}
  
  		return false;
  	}
docs: Gets an inflected word from the cache where the singular form is supplied.
  
  @param   string  $singular  A singular form of a word.
  
  @return  string|boolean  The cached inflection or false if none found.
  
  @since   1.0