"Do you all wear dresses?"
Translation:Tragt ihr Kleider?
"you all" is Duolingo's attempt at translating "ihr" (plural you) into English. I really think just "you" should be the correct translation as that is the second person plural pronoun in English, and then variants such as "you all", "y'all", "ye" or "you guys" should be alternatives.
Specifically, "you all" is the phrase used by the Pearson editors in some sentences they added for their course.
The sentences that they added are unfortunately visible to people taking the public course as well and this causes inconsistencies. Their course content is scheduled to be removed from the public course eventually.
When (whilst, for you Brits) I am making my German flashcards for "Phases" in which I put the phrase in English on the front of the card and the answer in German on the back of the card, I will put you all in English to denote that I am wanting a "plural you". But I know that I wouldn't actually say you all (besides I'm asking for the German equivalent and would say the phrase in German). Am I making sense to you all?
I suspect it is the same for the Duo course for EnglishGerman learners. Otherwise, I would have to put plural "you" wanted; instead it is just simpler to write the sentence with you all.
BTW, I am up to 1205 flashcards on Anki and will share them when I have finished the German tree. I pick up some phrases and short sentences from Duo; but I skim newspapers and articles on the internet also. I will definitely let you all know when I have reached a point where I feel it is time to share them. I am proud of them.
This sentence belongs to the Pearson course, but is unfortunately visible to the general public as well. (See https://www.duolingo.com/comment/24066422 and https://www.duolingo.com/comment/24052907/Duolingo%E2%80%99s-Partnership-with-Pearson for more information.)
Pearson editors seem to use "you all" as a hint that they expect the answer ihr -- this word choice is not standard for the public course.
And they generally do not accept ihr alle or Sie alle as translations for such sentences.
You can report those alternatives if you wish.