Some Feedback regarding the new language BB Code:
1: I guess it would be very useful to see all languages for the own posts (maybe you could auto convert the secondary language into a spoiler for you own). This might help checking the look and feel / design of the own posts in another language. At least in the preview this should work.
This may be worth as optional feature for other users post, too, as you can use this feature to censor you post for other languages or it becomes inunderstandable because of very bad google translates. Maybe add an option to set the preferred language and add a combobox inside the posts top right (left next to the id counter) to switch a posts language.
2: Like I said in the news: What happens if you define only one language for the full post? Will others still see it? Is the post just empty? Or is it missing completely? I didn´t wanted to test it here now but at least in the preview it is fully missing.
3: Maybe add a combobox with all available languages into the bb code editor ;)