Display content in specific language outside wordpress

Hello,

Before I’ve installed polylang, I’ve used following code to display latest topics on my site index page which is outside wordpress.

<?php
// Include WordPress
define('WP_USE_THEMES', false);
require('blog/wp-load.php');
?>

<?php
$posts = get_posts('numberposts=4&order=DSC&orderby=post_title');
foreach ($posts as $post) : start_wp(); ?>
<h6 class="datum"><?php the_date(); echo "<br />"; ?></h6>
<h2 class="naslov"><?php the_title(); ?></h2>
<div class="entry-content"><a class="blognaslov" href="<?php the_permalink(); ?>" title="<?php printf( esc_attr__( 'Permalink to %s', 'twentyeleven' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark">Read More</a><br><br></div>
<?php
endforeach;
?>

It still works, but displays post in both languages that I use.
Is it possible to display only posts in one of the languages.

I’ve found this in polylang documentation (p.12), but it doesen’t work.

$posts = get_posts(array(
'post_type' => 'post',
'lang' => 'fr', // use language slug in the query
'showposts' => 5
));

And Second question, is it possible to display links to pages outside wordpress that are added in header.php in language that is currently active?

http://ww.wp.xz.cn/extend/plugins/polylang/

[ Please do not bump, that’s not permitted here. ]