Are you coming to Barcelona? We really hope to see you there :) Plan with arriving early or leaving late if you want to sprint uninterrupted at the extended sprints: https://events.drupal.org/barcelona2015/sprints. Please sign up for the sprint.
What are you working on? Do you need help? Are you looking for new tasks? Come discuss with us! We have tasks for all kinds of interests on all kinds of difficulty levels! All help is welcome!
Meetings are regularly every week at the same time on Wednesdays. Check out http://www.drupal8multilingual.org/events for the calendar of upcoming meetings and sprints.