another 2 issues:
1.
i found some spiders use lang atrr in url twice and some of them tribble
like :
www.mysite.com/en/sk/forum/index.html
as u see this may duplicate contents is there any httaccess to redirect them to the first language to prevent duplicate contents
2.
when translated pages , the links that has nofollow it will be without this nofollow
i use vbseo to add nofollow to all php files also to external link
i see it will be lost after translated