Not at all. While we would recommend memorising a few stock phrases, it is possible to get by without learning any Russian.
Be aware, though, that outside of the larger cities such as Moscow and Saint Petersburg, very few people will speak English or othr languages, and even less will be written in English or other languages. Even within the major cities you may find use of languages other than Russian limited.
Before leaving for your trip, it may be worth investing in a simple phrase book, or downloading one of the many translation apps available for your mobile devices.
If the language barrier does cause any problems for you, contact one of our travel specialists and they should be able to advise you of the best course of action.