No comment on the English Level...
I've flow myself many, many times into Moscow, St. Petersburg and Samara with teh A320, and I've allways been scared of this kind of situations in their airspace... most of them are really unable to handle an emergency due to a language issue...
It's the only place where they've called me during the takeoff run to ask me to contact departure... the only place I've been changed an SID once airborne... the only place I've not been informed by the controller at any time the braking action was poor until an Emirates 777 that was my preceding traffic was about to overrun the runway (we had to go around)... etc. etc.