@Claudius gave an example of a family that opted to maintain the memory of its heritage alive. There would then be some. Perhaps the Transural Soviets would adopt as policy the deliberate preservation of languages and cultures eradicated by the Nazis as a defiance of the Reich and a threat, however Lilliputian. But frankly it seems far more likely that any such policy would be temporary and at some point the pressure would be on to assimilate to "Great Russian" cultural norms, and by 2018, in all refuges of the survivors of "Non-Aryan" Eastern Europe, at most there might be some memory among their descendants.