"They talk about a different category."

Translation: De talar om en annan kategori.

[SKWARDOL]

kan man säga, De talar om en olika kategori.

[HelenCarlsson]

No, "olika" is the plural form of the adjective, so you can say "De talar om olika kategorier".

The form "olik" exists too, but it normally means "different from", e.g. "Den ena kategorin är olik den andra.

PS. "Olika" can also be an adverb: vi tänker olika - we think differently

[ZamfirY]

Can one use "andra" in this case?

[devalanteriel]

Yes, but it would mean "a second category".

[ZamfirY]

Oh ok, so it means they talk about one category and also a second one. I see. Thanks.

[miko650360]

Why not pratar?

[devalanteriel]

That's also fine.

[Helmut83]

And how would you say "they talk about another category"?

[devalanteriel]

The same way, so we accept both as translations. :)

[MicMac75]

what does "annorlunda" mean?

[devalanteriel]

Different, as in nonstandard or peculiar.

[rusty401767]

Is olika not different?

[devalanteriel]

Please see the top comment chain.