Interview for class different languages

I interviewed Willi from germany.  His family is from east germany. They have a specific east german accent, so if I was from west germany I would be able to tell where they were from by the way theytalk. His parents grew up in east germany, and now they moved to west germany.  West germany doesn't have an identifiable accent because they are known to speak very straight forward german.  His parents are slowly losing their accents and adapting to their new home and language.  In work Willi's parents speak more formal. They are both scientists so they have their own specific language. This language ties into their job.  Willi grew up in west germany with a more accentless german. They all speak english for work in his parents case. Willi speaks french as well as english.