Science in the Pub Series - on 28th of May - In most European countries the concept of “one language –one nation” is prevalent although national minorities are also living there. Due to international migration, however, the identity of European nation states has changed lately. The ethnic composition of countries and large cities has changed tremendously, and more and more mixed language areas are formed where people become bilingual. The use of two or more languages entails integration of two or more cultures and changes the original nation state identity.