"Jeg kan betale dig tilbage i morgen."

Translation: I can pay you back tomorrow.

[-Zorua-]

Yes! I finally remembered that "i morgen" translates to "tomorrow"!

[daddyyak]

"repay" should also be an acceptable translation of "betale tilbage"

[HuibRenes]

Wimpy@Popeye

[Branko841886]

Bug in the app

[Clarkarot]

Can i pay duolingo premium back tomorrow

[ElliottPet4]

Duolingo plus!
Or, as it says when talking about progress quizzes

Duolingo plus [plus]