Ukrainian is very similar to Serbian ....i was just watching on YouTube...Russians say "ponjemajesh" while the Serbs say razumijesh...also words brat, sestra, tata, mama are the same when speaking: brate, sestro.. Or Serbs use words dobro i lose, or grammar like "ja tebe ne razumijem". Anyhow, when millions speak Russian it should be an official language there..