How to translate content in category.php or index.php with qtranslate?

I was wondering how to translate content under index.php (or category.php with qtranslate?).

I’m using twenty twelve theme.

My code on index.php:

<?php
/**
* The main template file.
* @package WordPress
* @subpackage Twenty_Twelve
* @since Twenty Twelve 1.0
*/
?>
<?php get_header(); ?>
<?php 
$page_id = 1500;
$page_data = get_page( $page_id );
echo apply_filters('the_content', $page_data->post_content);
?>
<section id="last-articles_homepage">
<h1>Latest News</h1>
...

I would like to translate the content inside the <section> and <h1> tag for example in french.

Most correct way to do this would be to use WordPress translations.

You should replace this static text with:

<?php _e('YOUR TEXT', 'your_text_domain'); ?>

And add text domain to your theme.

More on this topic: http://codex.wordpress.org/I18n_for_WordPress_Developers

You can also…

… use qtrans_useCurrentLanguageIfNotFoundUseDefaultLanguage function.

Just use it like so:

<?php echo qtrans_useCurrentLanguageIfNotFoundUseDefaultLanguage('<!--en:-->Latest News<!--:--><!--fr:-->dernières Nouvelles<!--:-->'); ?>