CSS stylesheet depending on current language

Change CSS stylesheet if user switch to other language. IN addition to the code below you must create an indyvidual stylesheet for each language.

/**
* @file template.php
*/
function mytheme_preprocess_page(&$vars, $hook) {
   $lang_css_path = path_to_theme() . '/css/style_' . i18n_get_lang() . '.css';
  drupal_add_css( $lang_css_path, 'theme', 'all', FALSE);
  $vars['styles'] = drupal_get_css();

}

Warning: This tip works only with Drupal 6