Ni kunordigos artistojn kaj anoncos prokraston anstataŭ nuligi la festivalon.

Because -os is the Esperanto future-tense ending.

• kunordigos = will coordinate
• anoncos = will announce

In Esperanto, each finite verb normally shows its own tense. So if both actions are in the future, both verbs take -os.

It can be broken down like this:

• kun- = together, with
• ord = order
• -ig- = make, cause
• -os = future tense

So kunordigi is to coordinate, literally something like to bring into order together, and kunordigos means will coordinate.

Because it is:

• plural: -j
• the direct object: -n

So:

• artisto = artist
• artistoj = artists
• artistojn = artists, as the thing being coordinated

This is very common in Esperanto: plural direct objects end in -jn.

For the same basic reason: they are direct objects.

• anoncos prokraston: the thing being announced is prokraston
• nuligi la festivalon: the thing being canceled is la festivalon

So the -n here is not about motion or anything special; it is simply the accusative ending marking the object of the verb.

Because la is used when the noun is specific or identifiable in context.

• la festivalon suggests a particular festival that speaker and listener already know about.
• artistojn does not have la, so it sounds less specifically identified: just artists in general, or the relevant artists without stressing definiteness.
• prokraston also appears without la, which makes it sound like a delay/postponement, not necessarily the specific already-mentioned delay.

In real usage, context decides a lot. If the artists were a clearly known group, you could also say la artistojn.

Because anonci is commonly used as a transitive verb. That means it can take a direct object directly.

So Esperanto can say:

• anonci prokraston = announce a delay
• anonci decidon = announce a decision
• anonci novaĵon = announce news

English sometimes uses a direct object the same way, so this part is actually fairly similar.

You could also express the idea in other ways, such as anonci, ke estos prokrasto, but anoncos prokraston is perfectly normal.

Because anstataŭ means instead of, and in Esperanto it can be followed by an infinitive to express instead of doing something.

So:

• anstataŭ nuligi la festivalon = instead of canceling the festival

This is a very natural Esperanto structure. English uses a gerund here, but Esperanto often uses the infinitive.

A learner may expect something more like instead of canceling with a special verb form, but Esperanto handles this neatly with anstataŭ + infinitive.

Because festivalon is not the object of anstataŭ. It is the object of nuligi.

The structure is:

• anstataŭ nuligi la festivalon
• nuligi = to cancel
• la festivalon = the festival, as the thing being canceled

So even inside that anstataŭ phrase, the infinitive nuligi keeps its own direct object, and that object takes -n as usual.

They are related, but not exactly the same.

• prokrasto usually means a delay/postponement
• malfruo usually means lateness

For an event like a festival, prokrasto is a better fit if you mean the event will be put off or postponed. Malfruo would more naturally suggest that something is simply running late.

So in this sentence, prokraston is the more appropriate choice.

Yes. The single subject ni governs both kunordigos and anoncos.

So the sentence means that we will do both actions:

• we will coordinate artists
• and we will announce a delay

Esperanto often leaves the subject unstated after kaj when it is still the same subject. Repeating ni would be possible, but unnecessary.

Yes, to some extent. Esperanto word order is fairly flexible because endings show the grammatical roles.

For example, the core relationships stay clear because of endings like -n. However, the given order is natural and easy to follow.

The original version works well because it presents:

1. the subject: Ni
2. the two main future actions: kunordigos and anoncos
3. the alternative action not taken: anstataŭ nuligi la festivalon

So while word order can vary, this sentence is a clear, standard choice.