There are two weekly meetings on wordpress.slack.com in #polyglots. Wednesdays at 12:00 UTC and Thursdays at 2:00 UTC.
Everything is automated as of WordPress 4.1
WordPress 4.1 polyglot instruction manual
http://goo.gl/BaAuXj
Blog post Multilingual WordPress done right
http://opnstre.am/mlwpright
Multilingual content is definitely going to happen [in core] at some point, but there’s a lot of different markers that probably need to happen first for it to make sense for each of these steps to occur.
Andrew Nacin at WordCamp SF 2014
Slides are available at
http://slides.com/nickweisser/translating-wordpress/
Contact me on Twitter @nickweisser, by email nick@openstream.ch or join us every Wednesday and Thursday on wordpress.slack.com