Hi !I am not sure if this is the right topic for my question but may be...

Anyone can explain me how can I change the forum language form english to russian or romanian ? I know that my be is a simple question but I have no idea - If is posible to explain me FROM SCRATCH .
Everything I know is - I have to download the language pack ( ok -I can do that ) to my PC, after to uploud it to ...

I dont know where and how ...
I am not good in PHP or something like that .
Thank you
Iurii