La sala està desordenada després de la festa.

Catalan usually uses estar for a temporary state or condition, and ser for identity, classification, or more permanent characteristics.

So La sala està desordenada means the room is messy right now, probably because of the party.

If you said La sala és desordenada, it would sound more like being messy is an inherent characteristic of the room, which is not the usual idea here.

Because adjectives in Catalan normally agree in gender and number with the noun they describe.

• la sala = feminine singular
• so the adjective must also be feminine singular: desordenada

Compare:

• el menjador està desordenat = the dining room is messy
• la sala està desordenada = the room/living room is messy
• les sales estan desordenades = the rooms are messy

Sala can mean room, but very often it means a main room such as a living room, hall, or lounge, depending on context.

In this sentence, English might translate it simply as the room or more specifically the living room, depending on what the original context is.

It is not always the same as:

• habitació = bedroom / room in the sense of a bedroom
• cambra = chamber/room, less common in everyday speech in some contexts

Després de means after when it is followed by a noun or an infinitive.

Here it is followed by a noun phrase:

• després de la festa = after the party

The de is required here.

Compare:

• després de la festa = after the party
• després de menjar = after eating

But with a full clause, Catalan often uses després que:

• després que vam marxar = after we left

Because la festa refers to a specific party, not just any party in general.

Catalan uses the definite article much like English does here:

• després de la festa = after the party

If you said després d'una festa, that would mean after a party, with a more indefinite meaning.

The sentence follows a very common Catalan pattern:

subject + verb + adjective + time phrase

Breakdown:

• La sala = the room
• està = is
• desordenada = messy / untidy
• després de la festa = after the party

So the structure is straightforward and very natural.

Yes. Both are possible, but La sala està desordenada is very natural and direct.

You may also hear:

• La sala està en desordre = the room is in disorder / untidy
• La sala és un desordre = the room is a mess

These are similar, but not identical in tone:

• està desordenada sounds like a normal description of its current state
• està en desordre is slightly more formal or descriptive
• és un desordre is stronger and more expressive

Because desordenada is a predicate adjective here. It is not directly attached to the noun; it comes after the verb estar and describes the subject.

So:

• La sala està desordenada = The room is messy

This is the same basic pattern as in English:

• The room is messy

If the adjective were directly before or after the noun inside a noun phrase, that would be a different structure.

Està is pronounced roughly es-TA, with the stress on the last syllable.

The accent mark tells you where the stress goes:

• està

That written accent is important. Without it, the word would not follow normal spelling expectations.

Usually, the subject can be omitted if it is clear from context, because Catalan is a pro-drop language. But in this sentence, La sala is important information, so it is included.

For example, if everyone already knows you are talking about the room, someone might say:

• Està desordenada després de la festa.

That would mean:

• It is messy after the party or
• The room is messy after the party

But without context, including La sala is clearer.

Yes. Després de la festa is mainly a time expression: after the party.

However, in context it also strongly suggests the reason for the mess. So the sentence literally gives a time relation, but listeners naturally understand that the party probably caused the disorder.

If you wanted to express cause more directly, you could say:

• La sala està desordenada per culpa de la festa. = The room is messy because of the party.

But the original sentence sounds more natural and neutral.

Yes, Catalan allows some flexibility, especially for emphasis.

The neutral order is:

• La sala està desordenada després de la festa.

You could also say:

• Després de la festa, la sala està desordenada.

This puts more emphasis on the time phrase after the party. Both are correct, but the original is the most neutral everyday order.