Is it necessary to study foreign languages in our days? Of course. Yes. We live in epoch of globalization when people interact with each other rather intensively. There are many international organizations, people travel a lot either on business or during their holidays etc. A lot of companies education and research institutions develop their international activity dealing with foreign partners at different conferences and congresses.
There are some international language: English, French, Spanish. English take a special place among.
It is very important to have your articles published in foreign journals, to keep and touch with your colleagues abroad exchanging and ideas. In my opinion a highly qualified Russian specialist who know English and other foreign languages can contribute more to the national and world science.