I'm Russian and Belarusian native speaker, and I can assure you that only native speaker can translate particularly difficult stuff into Russian. It doesn’t matter if your “Expert” lived in Russia for 2 or 22 years, it’s just impossible to learn all the vocabulary, idioms and figures of speech. I know them. I specialize in legal translation, since I’ve chosen International Law as my Bachelor degree. But actually I can translate everything what you need (within reason) into Russian. Punctuality and openness to new experience allow me to undertake a variety of assignments.