Sinkronizacija je spremna.

• sinkronizacija = the subject of the sentence
• je = is, the 3rd person singular present form of biti (to be)
• spremna = ready, an adjective describing the subject

So the structure is:

[subject] + [is] + [adjective]

Very literally: Synchronization is ready.

Because Croatian usually uses the verb biti (to be) in sentences like X is ready, X is good, X is important, etc.

So:

• On je umoran. = He is tired.
• Kuća je velika. = The house is big.
• Sinkronizacija je spremna. = The synchronization is ready.

Unlike in some Slavic languages, Croatian normally does not drop is/are in the present tense in this kind of sentence.

Because it agrees with sinkronizacija, which is a feminine singular noun.

In Croatian, adjectives must agree with the noun they describe in:

• gender
• number
• case

Here:

• sinkronizacija is feminine
• singular
• nominative

So the adjective must also be feminine singular nominative:

• masculine: spreman
• feminine: spremna
• neuter: spremno

Examples:

• Program je spreman. = The program is ready.
• Sinkronizacija je spremna. = The synchronization is ready.
• Sučelje je spremno. = The interface is ready.

A very common clue is the ending -a. Many Croatian nouns ending in -a are feminine.

So sinkronizacija is feminine, which is why the adjective is spremna.

This is a very useful pattern for learners, though not every noun follows it perfectly. But for this word, yes: sinkronizacija is feminine.

It is in the nominative, because it is the subject of the sentence.

The basic dictionary form of a noun is usually nominative singular, and that is what you see here:

• sinkronizacija = nominative singular

Since the adjective is part of the predicate and refers back to the subject, it also matches that nominative singular feminine form:

• spremna

Yes, spremna is the normal form here.

In Croatian, predicate adjectives like ready, big, good, important are normally used in the regular agreeing form:

• Datoteka je spremna.
• Soba je čista.
• Ideja je dobra.

So in this sentence, spremna is exactly what you would expect.

Yes. Sinkronizacija je spremna. is a completely normal, neutral word order.

Croatian word order is fairly flexible, but the most neutral version here is:

Sinkronizacija je spremna.

Other orders are possible for emphasis, for example:

• Spremna je sinkronizacija.
  This sounds more marked, as if emphasizing ready.

A learner should usually stick with the neutral order unless there is a special reason to change it.

The most standard way is:

Je li sinkronizacija spremna? = Is the synchronization ready?

A very common conversational alternative is:

Je l' sinkronizacija spremna?

You may also hear rising intonation in speech, but for learners, Je li ...? is the safest and most standard pattern.

Because Croatian does not have articles like English a/an/the.

So sinkronizacija can mean:

• synchronization
• the synchronization

The exact meaning depends on context.

That is why Sinkronizacija je spremna. can naturally be translated as The synchronization is ready even though there is no separate word for the.

A simple learner-friendly pronunciation guide is:

seen-kro-nee-ZA-tsee-ya ye SPREM-na

A few helpful points:

• j is pronounced like English y in yes
• c is pronounced like ts
• ija at the end of sinkronizacija sounds roughly like ee-ya
• je sounds like ye
• spremna has a clearly pronounced mn cluster

So:

• sinkronizacija ≈ seen-kro-nee-za-tsee-ya
• je ≈ ye
• spremna ≈ sprem-na

It is an international/borrowed-style word, and that is very common in Croatian, especially in technical or modern contexts.

It is fully usable and normal in Croatian. English speakers often find words like this easier because they resemble familiar international vocabulary.

You may also notice that Croatian spelling is quite phonetic, so even borrowed words are written in a way that matches Croatian pronunciation.

Sometimes yes, but the meaning changes a bit.

• spremna = ready
• gotova = finished / done

So:

• Sinkronizacija je spremna. = the synchronization is ready
• Sinkronizacija je gotova. = the synchronization is finished / completed

In some contexts those may be close, but they are not exactly the same. Spremna focuses on readiness; gotova focuses on completion.

Yes, very much so.

Sinkronizacija je spremna. sounds like a system message, interface message, or status notification. Croatian often uses clear, direct sentences like this in technical contexts.

You might also see related messages such as:

• Sinkronizacija je dovršena. = Synchronization is complete.
• Sinkronizacija je u tijeku. = Synchronization is in progress.
• Sinkronizacija nije uspjela. = Synchronization failed.

So this sentence fits very naturally in a digital or technical environment.