Multilingualism in Post-Soviet Countries

The dissolution of the USSR has created conditions for a unique sociolinguistic experiment, in which fourteen countries, previously united by the same language and political system, engaged in a nation-building process, creating new linguistic regimes. Two decades later, how did these countries fare in their struggle to initiate a shift from Russian to the titular languages? Which ones succeeded and which ones restored Russian as an official language? How did they go about articulating the right