Di kelas debat, kami saling membantu supaya semua orang lebih percaya diri.

Literally, di kelas debat means in debate class.

• di = in, at
• kelas = class
• debat = debate

So di kelas debat is a prepositional phrase telling you where the action happens.

A very literal breakdown would be:

• Di kelas debat = in the debate class / in debate class

In natural English, you might translate it as In debate class or In our debate class depending on context.

This is a very common and important question.

Indonesian has two words for we:

• kami = we, but not including the listener
• kita = we, including the listener

So in this sentence, kami suggests that the speaker is talking about their group, but the person being spoken to is not part of that group.

For example:

• Kami saling membantu = We help each other (but not you)
• Kita saling membantu = We help each other (including you)

If a teacher were talking to students and included them, kita might be more appropriate.

Saling membantu means help each other or helping one another.

• saling = one another / each other
• membantu = to help

Together, they express a reciprocal action: the people involved are helping one another, not just helping someone else.

Examples:

• Mereka saling mengenal. = They know each other.
• Kami saling mendukung. = We support each other.
• Kami saling membantu. = We help each other.

So saling is a very useful word when you want to express mutual actions.

Because membantu by itself just means to help. It does not automatically mean help each other.

Compare:

• Kami membantu guru. = We help the teacher.
• Kami saling membantu. = We help each other.

Without saling, the verb usually points to helping some other person or thing.
With saling, the action goes back and forth among the people in the group.

Supaya means so that, in order that, or so.

It introduces the purpose or goal of the action.

So:

• kami saling membantu = we help each other
• supaya semua orang lebih percaya diri = so that everyone becomes more confident / is more confident

In other words, the helping has a purpose: making everyone feel more confident.

Other similar words are:

• agar = so that
• biar = so that / let
• sometimes untuk = to / in order to, though it is not always used in exactly the same way

In this sentence, supaya sounds very natural.

Yes. In this sentence, agar would work very well.

• Di kelas debat, kami saling membantu supaya semua orang lebih percaya diri.
• Di kelas debat, kami saling membantu agar semua orang lebih percaya diri.

Both mean basically the same thing: In debate class, we help each other so that everyone is more confident.

A rough nuance:

• supaya is very common and natural in everyday speech
• agar can sound a little more formal or polished, though it is also common

In many contexts, they are interchangeable.

Semua orang means everyone or all people.

• semua = all, every
• orang = person / people

So literally it is something like all people.

In this sentence, semua orang refers to everyone in that context, probably everyone in the debate class.

Examples:

• Semua orang tahu itu. = Everyone knows that.
• Saya ingin semua orang senang. = I want everyone to be happy.

Lebih usually means more.

So lebih percaya diri means more confident.

English speakers often expect a clear comparison, like more confident than before. In Indonesian, that comparison is often left unstated if it is obvious from context.

So here, lebih percaya diri can mean:

• more confident than before
• more confident in general
• increasingly confident

If you wanted to make the comparison explicit, you could say something like:

• lebih percaya diri daripada sebelumnya = more confident than before

But in everyday Indonesian, leaving it as lebih percaya diri is completely normal.

Yes, percaya diri is a very common expression meaning confident or self-confident.

Literally:

• percaya = believe, trust
• diri = self

So the literal idea is something like believe in oneself, but in actual usage it functions as the normal way to say confident.

Examples:

• Dia percaya diri. = She is confident.
• Saya kurang percaya diri. = I am not very confident.
• Anak itu sangat percaya diri. = That child is very confident.

So it is best learned as a set phrase.

Indonesian often expresses ideas more simply than English.

The phrase supaya semua orang lebih percaya diri literally looks like so that everyone more confident, but in natural English we often add is, feels, or becomes depending on context.

Indonesian frequently leaves that kind of linking verb unstated.

So this phrase could be understood in English as:

• so that everyone is more confident
• so that everyone feels more confident
• so that everyone becomes more confident

The exact English wording depends on context, but the Indonesian is perfectly natural as it is.

Indonesian verbs do not change form for tense the way English verbs do.

So membantu can mean:

• help
• are helping
• helped
• will help

The time is usually understood from context or shown with time words such as:

• sekarang = now
• kemarin = yesterday
• besok = tomorrow
• sudah = already
• sedang = in progress
• akan = will

In this sentence, there is no explicit tense marker, so it is best understood as a general present situation:

• In debate class, we help each other...

Yes, some parts can move around.

The original sentence starts with the setting:

• Di kelas debat, kami saling membantu supaya semua orang lebih percaya diri.

You could also say:

• Kami saling membantu di kelas debat supaya semua orang lebih percaya diri.

Both are understandable. The original version puts extra emphasis on where this happens: in debate class.

Starting with a place or time phrase is very common in Indonesian.

Indonesian does not always mark plural nouns the way English does.

Whether something is singular or plural is often clear from context.

For example:

• orang can mean person or people
• kelas debat can refer to the debate class as a concept, not necessarily needing any plural marker

Plurality can be shown by words like:

• semua = all
• reduplication, such as orang-orang = people

In this sentence, semua orang already clearly shows a plural meaning, so there is no problem.

Yes, there are a few natural alternatives, depending on style.

Very similar versions:

• Di kelas debat, kami saling membantu agar semua orang lebih percaya diri.
• Di kelas debat, kami saling mendukung supaya semua orang lebih percaya diri.

A slightly simpler version:

• Di kelas debat, kami membantu satu sama lain supaya semua orang lebih percaya diri.

Notes:

• saling membantu and membantu satu sama lain both mean help each other
• mendukung means support, which is close in meaning but not exactly the same as help

So the original sentence is already natural and correct.