Studio 2017 lets me choose Dari (Afghanistan) as working language. Dari is a regional variety of the Persian language, which you can also tell from the language shortcut 'prs-af'. Another regional variety is Farsi, the Persian spoken in Iran. Are the two languages treated as regional varieties by Trados (like e.g. German (Germany) and German (Austria)) or as separate languages? In other words: If I choose one of the two at setup, will both be available?