"Is Australia a continent?"
Translation:Ĉu Aŭstralio estas kontinento?
I don't know if "ĉu estas Aŭstralio kontinento" is correct or not, but thinking this way helped Duolingo's preffered word order make more sense to me:
If you think of "ĉu" as "is the following correct?", then the phrase "ĉu: Aŭstralio estas kontinento?" with an imaginary colon would be "is this correct: Australia is a continent".
That might not be very helpful, but it worked for me.
Country names are also capitalised.
Inhabitants and country-based adjectives are capitalised by some but lowercase by others. (The majority probably uses lower case: franco "a Frenchman", la angla "English (= the English language). But "Franco" and "la Angla" are also possible.)