Recently I have visited Wales for the first time. Apart from the dramatic scenery, what truly impressed me was the omnipresent bilingualism.
All road signs, information boards in shops and churches, were both in Welsh and English. These languages have a completely different origin, with Welsh belonging to the Brittonic group of the Celtic family of languages.
The mountainous terrain made Wales pretty much inaccessible for outsiders for centuries, thus the distinct language, culture and identity have developed. The linguistic politics of the authorities also helped.