I already said it. "Смуты" doesn't mean "Dark", except in a very abstract way, which is extremely confusing, since the "Dark Ages" are the period in European history from the fall of Rome (5th century) till around the 11th century, quite earlier than the timeframe of this mod. And when people see a mod called "Dark Ages", they usually expect hordes of Germanic, Slavic and other barbarians, ravaging the remains of the Roman Empire.
That's why I suggested "Смуты" to be more accurately translated as "Turbulence" or "Dismay", which sounds better (though the word itself can also be translated as "confusion", "perturbation", "disturbance", "tumult", "commotion", "unrest").