Forwarded from : http://drupal.org/node/254214
"After browsing through drupal.org for more than three hours: Could someone please scribble together for how to deal with the proper setup of a multilingual site with sub domains (one per language) and shared files?
Obviously it neither works to make a multisite setup (sites/en.domain.tld, sites/fr.domain.tld ...), and
$conf['i18n_variables'] = array( 'file_directory_path', );
seems not working either :-(