The multilang feature is designed to post a cookie so that users who left the site on a specific language (which is considered as their language of choice) will be the same when going to the site again.
I guess you could try to hack this by commenting both lines in languagefilter.php
Code: Select all
// setcookie(JApplication::getHash('language'), $lang_code, time() + 365 * 86400, $cookie_path, $cookie_domain);