Zahtev je uglavnom spreman.

Zahtev can mean request, demand, or requirement, depending on context.

In this sentence, it often means something like:

• the request
• the application
• the requirement
• the submission

A native speaker would choose the exact English translation from context. For example:

• in office or admin language, zahtev often means request or application
• in technical or project language, it can mean requirement

So the Serbian word is slightly broader than any single English word.

Je is the 3rd person singular present form of biti (to be), meaning is.

So:

• zahtev = the request / the requirement
• je = is
• uglavnom spreman = mostly ready

In Serbian, forms of to be are often omitted in some situations, but not here. When you have a sentence like X is Y with an adjective predicate, je is normally required:

• Zahtev je spreman. = The request is ready.
• Dokument je gotov. = The document is finished.

Uglavnom means mostly, mainly, or for the most part.

In this sentence, it softens the statement:

• Zahtev je spreman. = The request is ready.
• Zahtev je uglavnom spreman. = The request is mostly ready.

So it suggests that the request is not fully complete, but it is close.

Because spreman must agree with zahtev.

Zahtev is:

• masculine
• singular
• nominative here, because it is the subject

So the adjective also appears in masculine singular nominative:

• spreman

Compare:

• zahtev je spreman → masculine singular
• molba je spremna → feminine singular
• pismo je spremno → neuter singular
• zahtevi su spremni → masculine plural

This kind of adjective agreement is a very important feature of Serbian.

Not exactly, though they can overlap.

• spreman usually means ready
• gotov often means finished, done, or completed

So:

• Zahtev je spreman. suggests the request is ready to be submitted/used/processed.
• Zahtev je gotov. suggests the request is fully completed.

In real usage, the difference may sometimes be small, but spreman focuses more on readiness, while gotov focuses more on completion.

Because it is the subject of the sentence.

In Serbian, the subject of a basic statement is usually in the nominative:

• Zahtev je spreman.
• Dokument je gotov.
• Kuća je velika.

Here, the sentence is saying something about the request, so zahtev is the subject and stays in nominative.

Yes. Serbian word order is more flexible than English word order.

The neutral order here is:

• Zahtev je uglavnom spreman.

But you could also hear:

• Zahtev je spreman uglavnom.
• Uglavnom je zahtev spreman.
• Spreman je zahtev uglavnom.
  though this one sounds more marked or stylistically unusual

The most natural version in ordinary speech and writing is usually:

• Zahtev je uglavnom spreman.

Changing word order can change emphasis:

• Uglavnom at the beginning emphasizes mostly
• spreman earlier can emphasize the state of readiness

A rough pronunciation is:

zah-tev

More approximately:

• za like za in bizarre, but shorter
• h is clearly pronounced, unlike in most English accents
• tev with e like e in bet

A broad English-friendly guide would be: ZAH-htev

A few notes:

• z is always like English z
• h is a real consonant in Serbian
• stress is usually on the first syllable here: ZAHtev

Yes:

Захтев је углавном спреман.

Serbian officially uses both:

• Latin script: Zahtev je uglavnom spreman.
• Cyrillic script: Захтев је углавном спреман.

Both are standard Serbian.

Serbian has no articles like English a or the.

So zahtev can mean:

• a request
• the request

The exact meaning depends on context.

That is why one Serbian sentence can correspond to different English versions:

• The request is mostly ready.
• A request is mostly ready.

In real use, the situation usually makes it clear which one is meant.

You negate je with nije:

• Zahtev nije uglavnom spreman.

But this exact sentence may sound a little awkward depending on what you want to say. More natural alternatives might be:

• Zahtev nije spreman. = The request is not ready.
• Zahtev još nije spreman. = The request is not ready yet.
• Zahtev nije sasvim spreman. = The request is not completely ready.

If you want to keep the idea of mostly, you might also say:

• Zahtev je uglavnom spreman, ali ne sasvim. = The request is mostly ready, but not completely.

Yes, especially in administrative, business, office, or technical contexts.

It sounds fairly neutral and standard. It is the kind of sentence you might hear when talking about:

• paperwork
• an application
• a formal request
• a project requirement
• a document being prepared

In very casual conversation, the exact noun might change depending on the situation, but the structure is completely natural:

• Dokument je uglavnom spreman.
• Izveštaj je uglavnom spreman.
• Sve je uglavnom spremno.