Bunga di ruang tamu itu harum.

In Indonesian, a present-tense to be verb is often omitted when linking a subject to an adjective or noun.

So:

• Bunga di ruang tamu itu harum = The flower(s) in the living room is/are fragrant
• literally, it is closer to That flower / those flowers in the living room fragrant

This is completely normal Indonesian. You do not need adalah here.
Using adalah before an adjective like harum would sound unnatural in this sentence.

Itu often means that/those, but in sentences like this it can also function a bit like a definiteness marker, similar to the in English.

So bunga di ruang tamu itu can mean:

• that flower in the living room
• those flowers in the living room
• or more naturally in context, the flower(s) in the living room

It helps identify a specific flower or specific flowers already known from the context.

Because itu is marking the whole noun phrase, not just the noun by itself.

The full noun phrase is:

• bunga = flower / flowers
• di ruang tamu = in the living room

Together:

• bunga di ruang tamu = the flower(s) in the living room

Then itu comes at the end:

• bunga di ruang tamu itu

This is very common in Indonesian. A demonstrative like ini or itu often comes after the noun phrase it refers to.

It can mean either flower or flowers. Indonesian nouns usually do not change form for singular vs. plural.

So bunga may mean:

• a flower
• the flower
• flowers
• the flowers

You understand the number from context.

If the speaker wants to make plurality very clear, they might say:

• bunga-bunga = flowers

But in many natural sentences, simple bunga is enough.

Di is a preposition meaning in, at, or on, depending on context.

Here:

• di ruang tamu = in the living room

So it tells you where the flower(s) are located.

Important: this is the preposition di written separately from the following word.

• di ruang tamu = in the living room

This is different from the prefix di- used in passive verbs, which is written together with the verb.

It is written as two words:

• ruang = room / space
• tamu = guest

Together, ruang tamu means living room or literally guest room / guest-receiving room.

This is a fixed expression in Indonesian.

Because harum is the predicate adjective describing the subject.

The sentence structure is:

• Bunga di ruang tamu itu = subject
• harum = predicate adjective

So the sentence is basically:

• The flower(s) in the living room
  • fragrant

This is a very common Indonesian pattern.

Both can mean fragrant or nice-smelling, but there is a slight nuance.

• harum often sounds a bit more literary, elegant, or refined
• wangi is very common in everyday speech

So:

• Bunga itu harum = The flower is fragrant
• Bunga itu wangi = The flower smells nice

Both are natural, but harum can feel a little more polished.

Yes, Bunga can be a female name in Indonesian. But in this sentence, the rest of the sentence strongly suggests the common noun meaning flower.

Why?

• di ruang tamu = in the living room
• harum = fragrant

A person can be in the living room, of course, but harum makes flower the most natural interpretation here.

So learners should read bunga here as the noun flower.

Yes. Both are possible, because Indonesian does not mark singular/plural the way English does.

The best translation depends on context:

• if you are talking about one flower or one plant, use The flower in the living room is fragrant
• if you are talking about several flowers, use The flowers in the living room are fragrant

Indonesian leaves that open unless something else makes the number clear.

It would sound awkward and unnatural.

The natural order is:

• Bunga di ruang tamu itu harum

This keeps di ruang tamu attached to bunga, so it clearly means the flower(s) in the living room.

If you say Bunga itu di ruang tamu harum, it becomes harder to process and sounds like the sentence is put together in an unusual way.

Yes, but the meaning emphasis changes.

• Bunga di ruang tamu itu harum = The flower(s) in the living room is/are fragrant

  • in the living room describes which flower(s)

• Bunga itu harum di ruang tamu = The flower is fragrant in the living room

  • now in the living room sounds more like it describes where the fragrance is noticeable, not which flower

So the original sentence is better if you want in the living room to identify the flower(s).

A little, yes—but this sentence shows a predicate adjective, not an adjective directly modifying a noun inside a noun phrase.

Here:

• harum is not inside bunga harum
• it is the main description of the subject

So this is:

• Bunga di ruang tamu itu harum
  = The flower(s) in the living room is/are fragrant

If you used an adjective directly with the noun, Indonesian usually puts the adjective after the noun:

• bunga harum = a fragrant flower / fragrant flowers

So in both cases, adjectives commonly come after the noun, but the grammar role is different.