User blog comment:P.H. CP/Russian Letters(or words idk how to call this)/@comment-4018164-20150112152113

This is a unicode representation for characters. Whenever you see this: \ u xxxx It means that that whole thing represents the character xxxx (which is written in hexadecimal). The easiest way to decode this is to open your JavaScript console (Ctrl+Shift+J in chrome, for instance), enter that string (with the wrapping brackets), and press Enter to get the equivalent text output.

There are also online tools that allow you to paste that string, and convert it for you, like the one here (the Converts Unicode Entities to Unicode Text section) or here (in the \uXXXX text box).