lucy24 - 4:05 pm on Jun 10, 2013 (gmt 0)
... and that's why you should use the html lang attribute, and search engines should read it. Two of the first three Russian-language hits for the search terms cited (which will probably be deleted by a moderator since you made the mistake of admitting a relationship to the product) say explicitly "lang=ru". Same for bing-- though they do come up with more English in the top 10.
The absence of a "lang=something-other-than-english" tag doesn't automatically mean the page is in English. But its presence should imply pretty strongly that it is not. :(