Baku is a seething pit of corruption and it's the only place , so far, that I have seen chandeliers hanging from underneath highway overpasses. When you get out of the airport there the first thing you smell is oil. Pure unadulterated oil. It's omnipresent like hookers in the hotels there.
It is not a far stretch to make that money laundering was / is going on there.
And guess what? The common language is Russian.