"Do bread and cheese contain salt?"

Translation: Chléb a sýr obsahujou sůl?

[VladaFu]

OK everyone, please do check the handbook before complaining http://prirucka.ujc.cas.cz/?slovo=obsahovat

Obsahujou is "hovorové", that is the spoken form of standard Czech. It is the less formal form, but still standard. It is not Common Czech "obecná čeština".

[Possum563185]

I tried to read the discussion, but it seems that the answer is given in Czech only. Does the difference between obsahují/obsahujou have something to do with informal/formal (spoken/written) language?

[VladaFu]

-jí is more formal and -jou is more progressive but somewhat more colloquial

[chartsman]

Would it be correct to say "Obsahujou chléb a sýr sůl"?

[VladaFu]

yes

[Angelo_DM]

What's the difference between "chléb" and "chleba" (both in the nominative case)? Are they interchangeable?

[VladaFu]

chléb is more formal, but the meaning is the same

[listkiewska]

Why isn't it "obsahují"?

[VladaFu]

That is also possible and more formal.