Czech is as close to Russian as English to German.
Anyways, if you here “vodka [ineligible] [ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible] vodka” it’s either Russian or Polish.
If you here “pivo (beer) [ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible][ineligible] (pivo)” it’s Czech.
If they speak English and you here hear [pardon me, too much beer on Friday night] mostly “nation, state, god”, the person is either Polish or Russian or US.
If they speak English and you here hear [pardon me, too much beer on Friday night] mostly “freedom, beer, fuck off”, the person if probably Czech.