Historical vs. Legal Journey around Interconnection of Nationality and Citizenship: Old-times Czechoslovakia and New-times European Union Parallelism

Understanding of the issue of nationality vs. citizenship in Central European is significantly different from Western European countries. The Central European approach perceives these two as separate matters. The question could be if and how will this understanding spread in the EU. What role will the both matters play in creation of an identity of a European citizen? Will the nationality and citizenship be mostly complementary, overlapping, competitive, or irrelevant? Will the previous e.g. [Hungarian] nationality and [Slovak] citizenship be replaced by [Slovak] nationality and [European] citizenship or [European] nationality and [Slovak] citizenship? What are the foreseeable developments in this respect? Interesting would be to observe and evaluate what parallel(s) can be found in creation of Czechoslovak identity during the existence of the first Czechoslovak Republic (1918 – 1938) and creation of current European identity. My research summary will also include the interconnection of the matter of creation of an identity with the existence of dual legal system in a unitary state (by which Czechoslovakia established a very interesting paradox on the level of Europe of those times). Another point of empirical research would be what role (if applicable) the relationship between citizenship and nationality plays in creation of identity of young Europeans (young European citizens). E.g. do the citizens having different citizenship than nationality feel more as Europeans than those having the same nationality and citizenship?