After rotating VM my language on site is messed up {SOLVED}

[klodovik]

- Joomla 2.5.11
- VM 2.0.18a

My site is on serbian language, and only ...no multilanguage

I update VM to version 2.0.22 and not work good, i back to VM 2.0.18a

In backend i have serbian language, in frontend i dont have?! That situation is on site and VM

On my site domen i haved /en/?

What is happenned, how i can back to my language?

I check this:

1. In language filter, i setup "site language" not browser settings
2. in language manager, serbian language is default for site, admin panel, and content

Any suggestion?

EDIT:

Solved with restoring database.