Kaunter bayaran sudah dibuka.

In Malay, the main noun usually comes first, and the word that describes or specifies it comes after.

So:

• kaunter = counter
• bayaran = payment

Therefore kaunter bayaran means payment counter.

This is a very common Malay noun pattern:

• bilik tidur = bedroom
• kad kredit = credit card
• stesen bas = bus station

So kaunter bayaran is the natural word order.

Bayar is the verb to pay.

Bayaran is a noun formed from that verb, and it usually means payment, fee, or charge, depending on context.

So in kaunter bayaran, bayaran means payment.

This kind of noun formation is very common in Malay:

• ajar = teach → ajaran = teaching/doctrine
• makan = eat → makanan = food
• bayar = pay → bayaran = payment/fee

Because dibuka is a passive form, while membuka is an active form.

• membuka = to open / opens
• dibuka = is opened / has been opened

In this sentence, the focus is on the payment counter, not on who opened it. That is why Malay uses the passive form:

• Kaunter bayaran sudah dibuka.
  = The payment counter has already been opened / is already open.

If you wanted an active sentence, you would need someone doing the action, for example:

• Pekerja itu sudah membuka kaunter bayaran.
  = The worker has already opened the payment counter.

The prefix di- usually marks the passive voice in standard Malay.

So:

• buka = open
• dibuka = opened / is opened / has been opened

It tells you that the thing being talked about is receiving the action, not doing it.

A few more examples:

• ditutup = closed / is closed
• dibersihkan = cleaned / is cleaned
• dibayar = paid / is paid

Also, note the spelling: the passive prefix di- is written attached to the verb:

• correct: dibuka
• wrong: di buka

That is different from the preposition di meaning at/in/on, which is written separately:

• di sekolah = at school

Sudah means already, and it often shows that something has been completed or is now in the expected state.

So:

• Kaunter bayaran dibuka.
  = The payment counter is opened / open.
• Kaunter bayaran sudah dibuka.
  = The payment counter has already been opened / is already open.

In this sentence, sudah gives the idea that the opening has already happened.

Learners often compare sudah with telah:

• sudah = already, very common in speech and writing
• telah = has/have already, often a bit more formal

Both can work in many contexts.

It can suggest both, depending on context.

Malay often does not separate these ideas as sharply as English does.

So Kaunter bayaran sudah dibuka can mean:

• The payment counter has already been opened
• The payment counter is already open

The first highlights the action being completed.
The second highlights the resulting state.

In real life, an English speaker would often translate it as The payment counter is now open or The payment counter is already open, especially in a service or public setting.

Malay often does not use a verb like English be in the same way.

English needs forms like:

• is open
• has been opened

Malay can often express the idea without a separate word for is or has been. Instead, meaning comes from:

• word order
• particles like sudah
• context
• verb form such as di-

So Kaunter bayaran sudah dibuka is a complete natural sentence even though there is no separate word for is.

Yes. That is very normal in Malay.

The sentence focuses on the state of the counter, not on the person who opened it.

If you want to mention the agent, you can add it, often with oleh:

• Kaunter bayaran sudah dibuka oleh petugas.
  = The payment counter has already been opened by the staff member.

But in everyday use, especially on signs or announcements, the agent is usually unnecessary.

Yes, it sounds natural and appropriate, especially in public-service contexts such as:

• banks
• clinics
• ticket offices
• government service counters

It has a slightly official or announcement-like tone.

Depending on context, you might also hear or see:

• Kaunter bayaran kini dibuka. = The payment counter is now open.
• Kaunter bayaran telah dibuka. = The payment counter has been opened.
• Kaunter bayaran sudah buka. = The payment counter is already open.
  This is more conversational and less formally grammatical than sudah dibuka, but common in speech.

Yes, you might hear or see kaunter pembayaran, and it can also mean payment counter. But kaunter bayaran is very natural and common.

There is a small difference in feel:

• bayaran often refers to the payment/fee/charge
• pembayaran often refers more to the act or process of paying

So:

• kaunter bayaran = payment counter
• kaunter pembayaran = payment counter, with a slightly more formal or process-focused feel

In many real contexts, both are understandable, but kaunter bayaran is simple and idiomatic.

It is possible, but it sounds more marked and less neutral.

The normal, straightforward order is:

• Kaunter bayaran sudah dibuka.

This starts with the thing being talked about, which is very typical in Malay.

A reordered version like Sudah dibuka kaunter bayaran might be used for special emphasis or in a more literary style, but it is not the most basic pattern a learner should start with.

In everyday speech, people might say:

• Kaunter bayaran dah buka.
• Kaunter bayaran sudah buka.

Here:

• dah is a spoken short form of sudah
• buka may be used without di- in casual speech when describing the resulting state

So:

• Kaunter bayaran sudah dibuka = standard, clear, slightly more formal
• Kaunter bayaran dah buka = casual spoken Malay

As a learner, it is good to recognize both, but the original sentence is a strong standard model.