ezemans

I did it!

In functions.php:

load_theme_textdomain( 'My theme name', get_template_directory().'/languages' );
	$locale = get_locale();
	$locale_file = get_template_directory()."/languages/$locale.php";
	if ( is_readable($locale_file) )
		require_once($locale_file);
}

Then in the templates files I used for functions: __(

<?php the_content(__('Read more...', "My theme name")); ?>

and for simple strings I used: _e

<?php _e( 'Sorry, no posts matched your criteria.','My theme name' ); ?>

Fixed! ??

Thanks Samuel!
How are the translation functions? could you post and example, please.