There are two conflicting historical trends at work here.
One is the increasing tendency of regional ethnic
minorities to assert their distinct identities against
long-established political structures.
For instance, Irish nationalism, which besides the
political separation of Ireland from Britain has
included the increased usage of Irish phonology in
names (i.e. Patrick O'Connor-->Padraig O Conor) and
mandatory official use of Gaelic.
Scots Nationalism has been similar, and also Welsh nationalism.
The rise of Czech and Slovak ethnic consciousness also falls
into this category. In Spain, Basque nationalism and Catalan
separatism, and also _Galician_ activism. In France there was
actually a Breton nationalist movement, and ISTR hearing of
Sardinian separatism in Italy. There is trans-national
"solidarity" among the Lapp or Sami minorities in arctic
Scandinavia and Russia.
In the US, one sees a lot of ethnic assertiveness by Indians
and native Hawaiians; in Canada by the various "First Nations".
That's all on one side. On the other side is the simple fact
that distinctive ethnic traits (especially language) decline
precipitously from contact with mass culture. Ireland spends
huge amounts to produce cultural "content" in Gaelic, and
every official sign must be in Gaelic as well as English, but
hardly one Irishman in 20 actually speaks Gaelic.
In a non-Bolshevik Russia - coercive Russification would be
possible in an authoritarian regime, and might provoke serious
pushback. OTOH, in a free, capitalist Russia, Russia's many
small ethnic minorities would simply dissolve if not propped
up by state action (i.e. an official "Yougarian Council" with
a budget for "Yougarian" activities; or a Yougarian Autonomous
Region).
I note that many people from Russia seem to have non-Russian
backgrounds assimilated to Russian. For instance, figure skater
Elizaveta Tuktamysheva - an obvious Tatar or Mongol patronymic.
So it's not clear which trend wins out.
--
Nous sommes dans une pot de chambre, et nous y serons emmerdés.
--- General Auguste-Alexandre Ducrot at Sedan, 1870.