/**
 * Change Mailchimp API Response messages
 *
 * @param array $response The Response data.
 *
 * @return array
 */
function change_mailchimp_response_messages( $response ) {
	/**
	 * Check The Message
	 */
	switch ( $response['message'] ) {
		case 'Member Exists'; /** The Message */
			$response['message'] = __( 'Your Translation' ); /** Change The Message */
			break;
	}

	/**
	 * Return The Response Data
	 */
	return $response;
}
add_filter( 'jkit_mailchimp_response', 'change_mailchimp_response_messages' );