function mymodule_views_query_alter(&$view, &$query) {
  if ($view->name == 'yourviewmachinename') {
    $query->where[] = array(
      'conditions' => array(array(
        'field' => 'taxonomy_term_data.language',
        'value' => array('***CURRENT_LANGUAGE***'),
        'operator' => 'in',
      )),
      'args' => array(),
      'type' => 'AND',
    );
  }
}