I think a language/country subreddit or language-tagged threads might better solve the objective of a country/language specific mailing list.
One of the main benefits of a mailing list is that people get informed about new events and happenings even if they don't remember or have the time to check the main site regularly. You don't get that with subreddits or site threads.
Discussion article for the meetup : Helsinki LW meetup
WHEN: 20 July 2013 02:00:00PM (+0300)
WHERE: Hakasalmenpuisto
We’re having a meetup! Thanks to Kaj and Cat for organizing the previous meetup, where we had more than a dozen people. This time we’ll have a less formal meetup to get to know each other better, and to plan future meetups. We’ll also have a good chance to practice applied rationality, as one LWer has volunteered to let us help in deciding the direction of his studies.
To find us, look for someone wearing a pink elephant hat. We’ll be sitting in the park between the Opera house and Finlandia hall. If it rains, we’ll meet in Kaisla. You can also join our Facebook group.
Discussion article for the meetup : Helsinki LW meetup