What dialect of Arabic does this course teach
I was going to add arabic to my computer but there are soooooo many dialects to choose. which specific dialect does this teach?
supposedly the one in use hereis the Standard Arabic (or MSA, modern Standard Arabic). If you mean by "adding to my computer" that is adding a keyboard layout to type, then this has nothing todo with the language actually. It's just the organization of the keys in the keyboard layout differ little bit from one layout to another. Technically, you can pick any you feel comfortable with.
to be honest it doesn't make a difference really if you really need an answer probably just use Saudi Arabia for MSA however duolingo doesn't teach MSA either way it doesn't matter
It is MSA amalgamated with words and speech style from dialects (specifically Egyptian and from the Levant region). And so far not much effort was put into grammar. Still Beta they say so I'm not sure how long this status would remain.