"Est-ce que tu as déjà pris un train de nuit ?"

Translation: Did you already take a night train?

[Willis11565]

I think a better translation would be "have you ever taken a night train".

[Seattle_Scott]

Yes, in this case the English is wrong. Have you ever....is correct.

[lulularosa]

Yes, and if we all keep reporting it, maybe it will get added to the list of acceptable answers.

[Dave962976]

We can hope, although Duo is slow about corrections, if they bother.

[b_adger]

"Have you already taken a night train?" was just accepted for me, but it should be the "preferred" translation.

[Pecu01]

You couldn't say that with the words selection offered.
The authors just don't seem to fully understand the usage of past and present perfect in English. So I make two translations - a proper one in my head and a guess at what they think I should be saying; which is okay in trying to understand the French way of thinking.

[kallvt]

have you taken a night train yet

[Crotchet]

'Have you ever taken a night train before' not accepted

[larry684923]

Have to agree with Duo for a change. Every translation I can find shows "Did" rather than "Have"