Kakak perempuan saya masuk shift malam minggu ini, jadi dia tidur siang lebih lama.

Kakak means older sibling, without saying whether that sibling is male or female.

So:

• kakak saya = my older sibling
• kakak perempuan saya = my older sister
• kakak laki-laki saya = my older brother

In real Indonesian, people often just say kakak saya if the gender is already clear from context. Adding perempuan makes it explicit.

In Indonesian, possessive words usually come after the noun.

So:

• rumah saya = my house
• teman saya = my friend
• kakak perempuan saya = my older sister

This is the normal Indonesian pattern. English says my sister, but Indonesian says something closer to sister my.

Literally, masuk usually means to enter or to go in. But in everyday Indonesian, it is also commonly used for starting, joining, or being assigned to something such as work, school, or a schedule.

So masuk shift malam means something like:

• to be on the night shift
• to start working the night shift
• to have a night shift assignment

It is a very natural expression in everyday speech.

Examples:

• Saya masuk kerja jam 8. = I start work at 8.
• Dia masuk shift pagi besok. = She’s on the morning shift tomorrow.

Yes—at least in the sense that it is a very common loanword in Indonesian, especially in workplace contexts.

People often say:

• shift pagi = morning shift
• shift malam = night shift

A more fully Indonesian alternative might be something like giliran kerja malam, but shift malam is extremely common and natural.

That is a very good question, because malam Minggu in Indonesian often means Saturday night.

However, in this sentence, the most natural reading is:

• shift malam = night shift
• minggu ini = this week

So the phrase is understood as:

• She is on the night shift this week

Why? Because shift malam is a fixed, common work expression.

If someone specifically wanted to say Saturday night, they would usually make it clearer, for example:

• pada malam Minggu ini
• shift pada malam Minggu ini

Also, Minggu meaning Sunday is often capitalized, while minggu meaning week is not.

Here, jadi means so, therefore, or as a result.

It connects the two parts of the sentence:

• Kakak perempuan saya masuk shift malam minggu ini
• jadi dia tidur siang lebih lama

So the relationship is:

She is working the night shift this week, so she naps longer.

In everyday Indonesian, jadi is a very common way to show a result or consequence.

Yes, literally it is made of:

• tidur = sleep
• siang = daytime / noon / afternoon

But tidur siang is a fixed expression meaning:

• to take a nap
• to sleep during the day

So dia tidur siang lebih lama means she naps longer, or she sleeps longer during the day.

For duration of time, Indonesian usually uses lama, not panjang.

• lama = long, in the sense of lasting a long time
• panjang = long, in the sense of physical length

So:

• tidur lebih lama = sleep longer
• jalan yang panjang = a long road

That is why lebih lama is correct here.

Because the comparison is understood from context.

Lebih lama means longer, and Indonesian does not always need to say what it is being compared to if that is obvious.

So here, dia tidur siang lebih lama means:

• she naps longer
• she naps longer than usual
• she naps longer than before

If you want to make the comparison explicit, you could say:

• dia tidur siang lebih lama daripada biasanya = she naps longer than usual

Because lebih lama comes after the verb phrase it modifies.

Structure:

• tidur siang = take a nap / sleep during the day
• lebih lama = longer

So the order is naturally:

• dia tidur siang lebih lama

This is similar to many Indonesian adverb patterns, where the descriptive part comes after the action.

Compare:

• Dia bekerja lebih cepat. = She works faster.
• Dia tidur lebih nyenyak. = She sleeps more soundly.

Both dia and ia can mean he or she.

But:

• dia is more common and flexible in everyday use
• ia is a bit more formal and is usually used as a subject

In this sentence, dia is the most natural choice.

Also, Indonesian pronouns do not mark gender, so dia can mean either he or she. The earlier phrase kakak perempuan saya tells us the person is female.

It is not always strictly required, but it is very helpful and natural here.

The comma separates:

1. the cause/background: Kakak perempuan saya masuk shift malam minggu ini
2. the result: jadi dia tidur siang lebih lama

So the comma makes the sentence easier to read and understand, especially in writing.