How about observation bias as another reason. There are plenty of research papers written in Russian and Chinese (fewer every decade of course), but they aren't

How about observation bias as another reason. There are plenty of research papers written in Russian and Chinese (fewer every decade of course), but they aren't considered for Nobel prizes and they aren't reported on in the Western media because people in the West aren't exposed to them. A famous example is stealth aircraft, that's based on a Soviet research written in Russian and took a roundabout way to reach the US aircraft manufacturers.