Within version 4 of Admidio it's possible to add a country specific translation of a language. We have already implement this for portuguese. So there is the language portuguese with the language code pt that will represent the language spoken within Portugal. In addition to that we add portuguese brazilian with the language code pt-BR that will represent the language that is spoken in Brazil.
Now if you like to add translations for example German-Swiss or German-Austria please write us a short line and we will try to do the necessary steps with you.