Rename page in pagination url

functions.php

/*Change url page to stran*/
if ( ! function_exists( 'lr_page_to_seite' ) )
{
	register_activation_hook(   __FILE__ , 'lr_flush_rewrite_on_init' );
	register_deactivation_hook( __FILE__ , 'lr_flush_rewrite_on_init' );
	add_action( 'init', 'lr_page_to_seite' );

	function lr_page_to_seite()
	{
		$GLOBALS['wp_rewrite']->pagination_base = 'stran';
	}

	function lr_flush_rewrite_on_init()
	{
		add_action( 'init', 'flush_rewrite_rules', 11 );
	}
}