I could not understand what were they singing in the end, even though I am Russian. Although now that I've read "Absent delo lubovi intrigami napolnim, Gordosti i bednost' mi preodoleem. Priglasim eyo v nashi serdsa iz smoli i kamnya, Tepla darite skorey!" it seems to be true.
It is russian what we hear in chorus. They sing the part:
Absinthe love affairs, we fill our lungs with hymns of
Pride and poverty and we shall overcome
Bring her into our hearts of tar and stone
Until that warm embrace will come