Plain 'you' seems to be accepted now, though it gives 'you all' as an alternative translation. That southeastern US americanism does fill in a hole in English, and allows the translation to be more accurate. I don't mind using it for the plural 'you' as long as it is recognized in advance and Duolingo stays consistent.
You are 100% correct. "You" can mean singular you or plural you. "All" is redundant and improper grammatically in english. I don't care if Americans use it. It is still wrong. I mean, why not go all out Duolingo and add the southern "All y'all" to the accepted answers, if "you all" is going to remain as the only correct answer.
While there may be some truth here, you will need to provide a better source than 'native speakers of Italian or Spanish'. The course is attempting to use a reconstruction of a pronunciation from just under two thousand years ago. That is plenty of time for pronunciation to change.
Hello Moopish. To begin, My professor at CSUN, John Paul Adams, who is no slouch, did once remark in class that a doubled "r" gets more time than a single "r." This strikes me as eminently logical. Why would pronunciation of “rr” and “r” have been identical? Why not spell the word as “currerre,” or “curere,” if the two r sounds are identical? Latin seems to have had a high level of grapheme-to-phoneme correspondence, unlike English, and very much like Latin’s descendants, Italian and Spanish. Italy and Spain are not adjacent countries, and yet the clear distinction those two languages draw between “rr” and “r” is essentially identical: in both languages a double rr is a trill, where a single r is a flap, or tap. This strongly suggests a common origin, and the common ancestor of Italian and Spanish is, as we all know, Latin. And while two thousand years is most certainly enough time for pronunciation to change, it would be surprising if the exact pronunciation change happened in both languages, considering the considerable geographical difference between the two countries. My two cents. It would be worth noting that my comment was a suggestion, not a demand. I could be wrong. But I think I’m onto something here.