[Plugin: qTranslate] Duplicate post title of next/previous post

Good day!

I have a problen when i try input title of next/previous post after end of the text of post.

<?php
$next_post = get_adjacent_post(false, '', false); ?>
<?php if ($next_post) : $next_post_url = get_permalink($next_post->ID); $next_post_title = $next_post->post_title; ?>
                        <a class="post-next" href="<?php echo $next_post_url; ?>"><em>Next post</em><span><?php echo $next_post_title; ?></span></a>
                    <?php endif; ?>

It return good url, but next post title output on both language (Russian and English). Maybe anybody knows how show only one title on necessary langyage???

http://wordpress.org/extend/plugins/qtranslate/