Para komuter yang berdiri di dekat pintu segera duduk di bangku kosong ketika kereta berhenti.

Para marks a group of people and gives a formal or slightly written feel. So para komuter means the commuters or the group of commuters.

A few useful points:

• para is used for humans, not things
• it already makes the noun plural in meaning
• it is more common in formal writing than in casual speech

In everyday Indonesian, people might simply say komuter or use another plural strategy if the context is already clear.

Indonesian nouns do not usually change form for singular vs. plural. The same noun can mean one or more, depending on context.

So:

• komuter = commuter / commuters
• para komuter clearly means commuters
• context often tells you whether it is singular or plural

Indonesian does not add an English-style -s ending.

Yang introduces a clause that describes the noun before it. Here it works like who, that, or which in English.

So:

• para komuter = the commuters
• yang berdiri di dekat pintu = who were standing near the door

Together:

• Para komuter yang berdiri di dekat pintu = The commuters who were standing near the door

This is a very common Indonesian pattern:

• noun + yang + description

Here, both are the preposition di, meaning in / at / on / near, depending on context.

• di dekat pintu = near the door
• di bangku kosong = on the empty bench / seat

This is different from the prefix di- used in passive verbs.

Compare:

• di dekat pintu → preposition di
  • location
• dibuka → passive verb opened

A helpful spelling clue:

• preposition di is written separately: di rumah
• passive prefix di- is attached: ditulis

Dekat means near or close.

In Indonesian, di dekat pintu literally means at near door, but naturally it means near the door.

Indonesian does not need an equivalent of English the here, so:

• di dekat pintu = near the door
• di dekat jendela = near the window

This is a normal and very common structure.

Segera means immediately, right away, or soon, and adverbs like this often come before the verb in Indonesian.

So:

• segera duduk = immediately sat down / sat down right away

The position before the verb is very natural. Indonesian adverb placement is often flexible, but segera duduk sounds standard and smooth here.

The verb duduk means to sit or to sit down, and the place where someone sits is often introduced with di.

So:

• duduk di bangku kosong = sit/sat on an empty bench or seat

Even though English says sit on a seat, Indonesian often uses di for many location relationships that English splits into in, on, at, and so on.

In Indonesian, adjectives usually come after the noun.

So:

• bangku kosong = empty bench / empty seat
• kereta cepat = fast train
• rumah besar = big house

This is one of the basic word-order differences from English.

Both can refer to something you sit on, but they are not always identical.

• kursi usually means chair
• bangku can mean bench, stool, or sometimes a seat in public/shared seating contexts

In a train context, bangku kosong can sound natural for an available seat or bench-like seating area. In some situations, kursi kosong could also be possible, especially if the seats are more individual.

Ketika means when and introduces a time clause.

So:

• ketika kereta berhenti = when the train stopped / when the train was stopping

This is similar to English:

• They sat down when the train stopped

Indonesian often places the time clause after the main clause, as in this sentence, but it can also come first:

• Ketika kereta berhenti, para komuter ...

Both are correct.

Indonesian verbs do not change form for tense the way English verbs do.

So berhenti can mean:

• stop
• stops
• stopped
• is stopping

The time is understood from context. In this sentence, the surrounding events make it clear that berhenti refers to a past event in the story.

If needed, Indonesian can add time words such as:

• tadi = earlier
• kemarin = yesterday
• sudah = already

But often no extra marker is necessary.

It can cover both ideas. Indonesian verbs usually do not mark the difference between simple and continuous aspect as strictly as English does.

So yang berdiri di dekat pintu can naturally mean:

• who stood near the door
• who were standing near the door

In this sentence, English usually prefers were standing, because it describes an ongoing situation before the next event happened.

Yes, to some extent. Indonesian word order is fairly flexible, especially with time phrases or subordinate clauses.

For example, this is also natural:

• Ketika kereta berhenti, para komuter yang berdiri di dekat pintu segera duduk di bangku kosong.

That puts the when clause first for emphasis.

However, inside noun phrases, the order is less flexible. For example:

• bangku kosong is correct
• kosong bangku is not natural

And:

• para komuter yang berdiri di dekat pintu is the normal way to build that noun phrase

It sounds fairly neutral to slightly formal, mostly because of para and komuter.

Why:

• para is more common in formal or written language
• komuter is a standard word, but not especially casual
• the whole sentence has a clean written style

In casual speech, people might choose simpler wording depending on the situation, but this sentence is completely natural Indonesian.