Support for multilanguage sites, Internationalization (I18N)

PHP Code:
<?php if(!defined('IN_GS')){ die('you cannot load this page directly.'); } ?>
<?php if(return_page_slug()!="index") {

$links = return_i18n_breadcrumbs(return_page_slug());
$separator = ' <i class="icon fa-angle-right"></i> ';
?>
<div id="breadcrumbs">
    <div class="container" itemscope itemtype="http://schema.org/BreadcrumbList">
        <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
            <a href="<?php echo find_url('index',null); ?>" title="Domov" itemprop="item" class="domov">
                <i class="icon fa-home fa-lg"></i><span class="visuallyhidden" itemprop="name"><?php get_site_name(); ?></span>
            </a><?php echo $separator; ?>
            <meta itemprop="position" content="1"/>
        </span>
        <?php
        $n = count($links);    $gparent = "";
        for($i=0; $i<$n; $i++) {
            if($i==$n-1) $separator = "";
            if($links[$i]['menu']!="") $title = $links[$i]['menu'];
            else $title = $links[$i]['title'];
            $gparent = (empty($gparent)) ? $links[$i]['parent'] : $gparent;
            if($gparent != $links[$i]['parent']) {
                $links[$i]['parent'] = $gparent.'/'.$links[$i]['parent'];
            }
            if($links[$i]['parent']!="") $links[$i]['parent'] = "/".$links[$i]['parent'];
            $finalurl = rtrim($SITEURL,"/").$links[$i]['parent'].'/'.$links[$i]['url'];
            if($finalurl==$SITEURL.'index') $finalurl = rtrim($SITEURL,"/");
            echo '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">',
                    '<a href="'.$finalurl.'" itemprop="item" title="'.$links[$i]['title'].'">',
                        '<span itemprop="name">'.$title.'</span>',
                    '</a>'.$separator,
                    '<meta itemprop="position" content="'.($i+2).'"/>',
                '</span>',"\n";
        }
        if(return_page_slug() == "blog") {
            $separator = ' <i class="icon fa-angle-right"></i> ';
            if(nm_is_single()) {
                $all = nm_get_posts();
                foreach ($all as $post) {
                    if($post->slug == nm_post_slug(false)) {
                        echo $separator;
                        echo '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">',
                            '<a href="'.nm_post_url(false).'" itemprop="item" title="'.$post->title.'">',
                            '<span itemprop="name">'.$post->title.'</span>',
                            '</a>',
                            '<meta itemprop="position" content="'.($i+2).'"/>',
                        '</span>';
                    }
                }
            }
            elseif(nm_is_tag()) {
                echo $separator;
                echo '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">Značka: ',
                            '<a href="'.$SITEURL.'blog/tag/'.$_GET[NMPARAMTAG].'" itemprop="item" title="'.$_GET[NMPARAMTAG].'">',
                            '<span itemprop="name">'.$_GET[NMPARAMTAG].'</span>',
                            '</a>',
                            '<meta itemprop="position" content="'.($i+2).'"/>',
                        '</span>';
            }
            elseif(nm_is_archive()) {
                echo $separator;
                $newtime = $_GET[NMPARAMARCHIVE];
                echo '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">Archív: ',
                            '<a href="'.$SITEURL.'blog/archive/'.$_GET[NMPARAMARCHIVE].'" itemprop="item" title="'.$newtime.'">',
                            '<span itemprop="name">'.$newtime.'</span>',
                            '</a>',
                            '<meta itemprop="position" content="'.($i+2).'"/>',
                        '</span>';
            }
        }
        ?>
    </div>
</div>
<?php }