custom Fields

Hello,
as I can capture the value of the loaded custom field for each category?
For the post I call this way:

<?php $recent = new WP_Query("cat=18&showposts=5&lang=pt-BR"); while($recent->have_posts()) : $recent->the_post();?>
         <h3 class="titulo"><?php the_title(); ?></h3>
          <p class="data"><?php  the_field('data_noticia') ?></p>
 <?php endwhile; ?>

How do I call a specific category, the post only by language and custom fields?

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