"František je nechápe."

Translation: František does not understand them.

[Vixg]

I got that 'je' as personal pronoun object can be either 'it' or 'them'. Same for 'ně' if used after the preposition. Out of context is there a way to determine if the object is either singular or plural?

[endless_sleeper]

As a native, I'd understand it as referring to plural. Singular 'it' would be more likely expressed using 'to'.

[JohanDyrli]

How do we know "je" doesnt mean "it" in this exercise as it is in the previous one? Inconsistencies in the same section isnt great, espwcially with "je" already being complicated.

[VladaFu]

I will also note that, as endless_sleeper already mentioned, Czech speakers will generally understand the plural "them" here, unless the context clearly requires otherwise.

[BoneheadBass]

"It" is also accepted, as there is no context to suggest which is meant. Generally, if the original sentence is not specific, multiple appropriate translations are accepted.

[im.Andrew]

Can this sentence mean "František is the man who doesn't understand"? I got confused with "je" as "is" and "je" as "them".

[im.Andrew]

And what's the difference between "je" and "ně"?

[VladaFu]

The n forms are used with prepositions, it is in the Tips and notes.

[VladaFu]

no

[Chessnecof]

Could je refer to jokes?

[VladaFu]

yes (vtipy)

[Ragnar435681]

Can someone explain this please?

[svrsheque]

not without you defining "this".

[Ragnar435681]

I was asking how the Czech sentence was constructed. I read the "Tips" carefully and can not find where the "je" comes from.

[BoneheadBass]

Je ("them") is the accusative plural case form of oni/ony/ona ("they"). It is the direct object of the verb in this sentence. You might want to have a look at the following site, which is packed with useful information: https://en.wikipedia.org/wiki/Czech_declension#Personal_pronouns.