"She sings poorly."

Translation: Ona śpiewa źle.

[Bard.]

Czy "Ona kiepsko śpiewa" jest niepoprawne?

[Jellei]

Moim zdaniem pasuje idealnie, chyba że twórcy uznają to za zbyt potoczne.

[aczaja606]

What about, "ona śpiewa słabo"?

[Jellei]

Yes, it already works.

[And7709]

Ona zle spiewa. Tak jest poprawnie

[DavidLindon]

Why does zle not match the femenine ona? Eg ona spiewa zla?

[Jellei]

She sings "in a bad way", "badly", "poorly" - you need an adverb, not any adjective.

"Ona śpiewa zła" sounds as "She is singing and she's angry"

[smartpupa]

didn't try 'ona marnie śpiewa' - too scared to get it wrong. Would it have worked??

[Jellei]

It would not have worked, but it will from now.