"Are you younger than her?"

Translation: Är du yngre än hon?

[NotSoClever]

Why wouldn't it be henne in this situation?

[Zmrzlina]

Both are OK.

[WildSage]

It accepted henne.

I'm wondering if one is preferable?

[Zmrzlina]

AFAIK it's recommended to use subject forms in formal writing, but honestly it doesn't matter very much.

[MarcinM85]

In some situations there is a difference. For example:
Jag åt mer än hon.
Jag åt mer än henne.

[Lng52-._]

MarcinM85: Tack för bra jämförelse! ("Thanks for the good comparison!").

[MeiaSala]

In Swedish it is: 1. "yngre än henne" or 2. "yngre än hon ÄR". "yngre än hon" is poorly phrased spoken Swedish, and should be avoided in written form.

[Patty13647]

Are you younger than she is? Duolingo, you have a chance here to teach the correct English translation. Please use it!! There are already enough people saying this sentence incorrectly.

[bigswedeej]

These grammar mistakes drive me wild