Okay, so I know that some people are expecting some angst when Yang realizes that Blake didn’t come back for her, but consider this: Blake saw an entire room of people she knows and loves, but her focus and priority was Yang. She might not have come back specifically for her, but I bet that means something to Yang, that she was finally someone’s priority (and not just anyone’s but Blake’s). It might just counteract that, especially since Yang has no reason to think that Blake came back for her.
Okay, so we know Viktor is a bookworm. This has been established, right? Well, what about young Vitya who, when going around the world for competitions, buys books regardless of the language. And he orders dictionaries online, and translates them personally. (Because being at the top of the world can be kind of lonely.)