Hi Nadia09!
I was actually thinking about this very idea a little earlier, and came up with this:
1. Download and import the full English Curriculum.
2. Navigate to My Documents\BrillKids\Little Reader and make a copy of the entire Little Reader folder and its contents (note that this may take up at least 170mb!)
3. Rename that folder to "Little Reader - English"
4. You may now run Little Reader and translate the entire curriculum into Russian!
Because LR will always look for its media files at the path "My Documents\BrillKids\Little Reader", when you want to teach english, simply rename your now Russian curriculum to "My Documents\Little Reader - Russian" or something similar, and revert "Little Reader - English" to just "Little Reader".
Remember to CLOSE LR before renaming your folders, or you may damage your media library!Hope that helps,
Shuki