While that maybe true ( I know some folks who are reprinting them ), the translated editions from those days were all printed in USSR at Mir / Raduga / Progress presses itself. We've even had poets, writers and other luminaries from India visit Moscow for this and other things as part of cultural initiatives.
This is my go to method for pretty much every hard problem that I'm forced to solve where I don't have the domain expertise / interest / time. The trick lies in coming up with a clever similarity metric that incorporates penalties etc. You can even go a level deeper and use multiple similarity algorithms and then poll on top of them. Here's a taxonomy extractor for text that I made using similar principles that is surprisingly as good as anything else that I've seen - https://dash.scooptent.com/text