Register.php

        // account status
        $form->add(array(
            'name' => 'enabled',
            'type' => 'Zend\Form\Element\Select',
            'options' => array(

                'value_options' => array(
                    array(
                        'value' => 99,
                        'label' => 'French',
                        'selected' => 'selected',
                    ),
                    array(
                        'value' => -99,
                        'label' => 'Swedish',
                    )
                )
            ),

            'attributes' => array(

                'value' => 1
            )
        ));