Add this to your functions.php to make WP SEO work with qTranslate, per this thread: http://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-compatibility-with-qtranslate?replies=24#post-3797599

gistfile1.php

<?php

/**
 * Enable qTranslate for WordPress SEO
 *
 * @param string $text The string to translate
 * 
 * @return string
 */
function qtranslate_filter( $text ) {
  return __( $text );
}

add_filter( 'wpseo_title', 'qtranslate_filter', 10, 1 );
add_filter( 'wpseo_metadesc', 'qtranslate_filter', 10, 1 );
add_filter( 'wpseo_metakey', 'qtranslate_filter', 10, 1 );
add_filter( 'wpseo_opengraph_title', 'qtranslate_filter', 10, 1 );

I can't see any change in dashboard after adding this code, I expect the I will see multiple input for each language.