Hope you are doing well,
As i have gone through your question that you want to translate your websites front end in Russian if user has selected the language Russian.
For this you are required to work out the translate.csv files which will be available in your theme Package.
Example : app/design/frontend/default/SecuareWeb/locale/de_DE
In the locale folder you will find the folder for Russian language open that folder and you will find the file where you are required to add the required translation text in it.
How to add translation text in translate.csv file is given below.
Example: "This is the demo of translation in Russian","Это демо-трансляции на русском языке"
And one thing i would like add is that make sure your front end .phtml files must contain the text in $this->__("Example");. If you have added all the text like this then only then it will allow you for translation other wise it will not translate a text.
Hope this might be use full to you !!!
Waiting for your valuable comments in regards to your Question !!!