Learn Hardcore Indonesian: Setelah pesta selesai, kami bersih-bersih di ruang tamu. - After the party is over, we clean up in the living room.

Reduplication here turns the adjective bersih (clean) into an intransitive activity: bersih-bersih = “to do some cleaning/clean up.” It suggests a general, often informal, ongoing activity rather than a single, one-off action. Think “we did some cleaning” rather than “we cleaned X to completion.”

Can I use membersihkan instead of bersih-bersih?

Yes, but the grammar changes:

membersihkan is transitive and requires an object: Kami membersihkan ruang tamu.
Don’t say: Kami membersihkan di ruang tamu (unnatural).
bersih-bersih is intransitive and takes a location: Kami bersih-bersih di ruang tamu. Colloquially you may also hear: Kami bersih-bersih ruang tamu (treating the place as the scope of the activity). It’s common in speech.

Which is more natural after a party: bersih-bersih or beres-beres?

Both are natural, with a slight nuance:

beres-beres = tidying up/putting things back in order (collect cups, throw trash away).
bersih-bersih = cleaning surfaces/floors (wipe, sweep, mop). After a party, people often do both, so either verb works.

Why is it kami and not kita?

kami = we (excluding the listener).
kita = we (including the listener). Use kami if the listener wasn’t part of the cleaning; use kita if they were: Setelah pesta selesai, kita bersih-bersih di ruang tamu.

Does the sentence refer to the past, present, or future?

Indonesian doesn’t mark tense. Context decides. You can add markers if needed:

Past/completed: Setelah pesta selesai, kami sudah bersih-bersih… / Tadi setelah pesta selesai, kami…
Future/planned: Setelah pesta selesai, kami akan bersih-bersih… / Nanti…

Why is there a comma after Setelah pesta selesai?

When an adverbial clause (introduced by setelah) comes before the main clause, Indonesian normally uses a comma to separate them. If that clause comes after the main clause, a comma is usually not used.

Can I replace setelah with sesudah, sehabis, or seusai?

Yes, with register differences:

sesudah ≈ setelah (neutral).
sehabis/habis (colloquial): Habis pesta, kami…
seusai/usai (slightly formal/literary): Seusai pesta, kami… / Setelah pesta usai, kami… All are widely understood.

Is pesta selesai okay without sudah/telah?

Yes. selesai functions as a predicate (“is finished”). Adding sudah/telah just emphasizes completion:

Neutral: Setelah pesta selesai, …
More explicit/formal: Setelah pesta telah/sudah selesai, …

Can I say Setelah selesai pesta?

That order is unnatural. Prefer:

Setelah pesta selesai, …
Setelah selesainya pesta, … (more formal/nominalized)
Or use a synonym: Setelah pesta usai/berakhir, …

Why use di (in) instead of ke or pada?

di marks a static location: di ruang tamu (in the living room).
ke marks movement/direction: ke ruang tamu (to the living room).
pada is used with time, pronouns, or in formal styles; not for ordinary physical locations here.

Does ruang tamu mean “living room” or “guest room”?

ruang tamu is the living room (the guest-receiving room). A “guest bedroom” is kamar tamu. A “family room/den” is ruang keluarga.

Is the hyphen in bersih-bersih required?

Yes. Standard spelling uses a hyphen for reduplication (e.g., bersih-bersih, jalan-jalan). In casual texting people might omit it, but in proper writing you should include it.

Can I move the setelah-clause to the end?

Yes: Kami bersih-bersih di ruang tamu setelah pesta selesai. When it’s at the end, a comma is normally not used.