public function toSingular($language = 'en')
    {
        if (!class_exists('\\ICanBoogie\\Inflector'))
        {
            throw new \RuntimeException
            (
                "This method requires ICanBoogie\Inflector. ".
                "Install with: composer require icanboogie/inflector"
            );
        }

        return $this->newSelf
        (
            \ICanBoogie\Inflector::get($language)
            ->singularize($this->scalarString)
        );
    }