BEMINFO-563 - bem-info: Language switch has been fallen

![2014-10-08_1035](https://cloud.githubusercontent.com/assets/1333220/4554842/749cdec6-4eb5-11e4-9298-2b0ae5ab87fe.png)

@tadatuta error log from building bem-info with this case - 
[2014-10-09 13:28:24] ERROR __error.middleware__error.node.js: 500 Unknown error
And my page looks like
![1](https://cloud.githubusercontent.com/assets/1333220/4573879/d1476d76-4f96-11e4-9ed6-91fe6fe0c902.png)