O pessoal trabalha hoje.

In this sentence, o pessoal is a very common Brazilian Portuguese way to refer to the people, the staff, the group, or everyone in some context.

It often does not mean a specific set of individually identified people. Instead, it sounds like a collective group:

• people at work
• the team
• the staff
• the folks

So depending on context, o pessoal trabalha hoje could refer to:

• the employees
• the team
• everyone there

It is a very natural everyday expression in Brazil.

Because o pessoal is grammatically treated as a singular collective noun.

Even though it refers to more than one person, Portuguese usually matches the verb to the grammatical form of the subject, and o pessoal is singular. So:

• O pessoal trabalha hoje. = standard
• O pessoal trabalham hoje. = generally not standard

This is similar to English collective nouns in some varieties of English, like the team is working.

No. Pessoal can also be an adjective meaning personal.

For example:

• meu carro pessoal = my personal car

But in o pessoal, it is a noun expression meaning the people / the staff / the group.

This is a very common source of confusion for English speakers, because the same word can function in different ways.

The article o is part of the normal way to use this expression as a subject.

• o pessoal = the people / the staff / the group

Without o, pessoal often has a different feel. For example, by itself, Pessoal! is often used when calling out to a group, like:

• Guys!
• Everyone!

So in this sentence, o is important because it helps make o pessoal into the subject of the sentence.

Portuguese often does not use subject pronouns when they are unnecessary.

In English, you normally need a subject like they:

• They work today.

In Portuguese, the subject can be a noun phrase instead:

• O pessoal trabalha hoje.

And even when the subject is a pronoun, Portuguese often drops it if the meaning is clear:

• Trabalham hoje. = They work today / They’re working today.

So there is nothing missing here. The subject is already present: o pessoal.

Trabalha is the present tense, third person singular, of trabalhar.

Conjugation:

• eu trabalho
• você / ele / ela trabalha
• nós trabalhamos
• vocês / eles / elas trabalham

Because o pessoal is treated as singular, it takes trabalha.

Also, in Portuguese, the present tense can sometimes describe:

• a general habit
• something happening now
• a near-future event, depending on context

With hoje, it can sound like:

• they work today
• the staff is working today
• the team works today

It can correspond to either one in English, depending on context.

Portuguese often uses the simple present where English might use either:

• works
• is working

So O pessoal trabalha hoje might mean:

• The staff works today.
• The staff is working today.
• The team is on duty today.

Portuguese does have a progressive form:

• O pessoal está trabalhando hoje.

That version puts more emphasis on the action being in progress. But the simple present sentence is still very natural.

Yes. Hoje is flexible.

These are all possible:

• O pessoal trabalha hoje.
• Hoje o pessoal trabalha.
• O pessoal hoje trabalha.

The most neutral version here is probably O pessoal trabalha hoje.

Changing the position usually changes emphasis more than meaning:

• Hoje o pessoal trabalha. emphasizes today
• O pessoal trabalha hoje. is a straightforward statement

In Brazilian Portuguese, trabalha is roughly pronounced like trah-BA-lya.

The important part is lh:

• lh is like the lli in million for many English speakers, though not exactly the same in every accent
• it is not pronounced like a simple English l

So:

• trabalha ≈ tra-BA-lya

Also:

• stress falls on ba: tra-BA-lha

It is very common and natural in everyday Brazilian Portuguese. It is usually informal to neutral.

You will hear it a lot in speech:

• at work
• among friends
• in casual explanations

Depending on context, more formal alternatives might be:

• os funcionários = the employees
• a equipe = the team
• as pessoas = the people

But o pessoal is extremely useful because it sounds natural and flexible.

They are similar, but not identical.

• o pessoal = the people / the staff / the folks / the group
  Very common, conversational, flexible

• as pessoas = the people
  More literal and general

• a equipe = the team
  More specific, often in work, sports, or organized group settings

So:

• O pessoal trabalha hoje. sounds like everyday Brazilian Portuguese
• As pessoas trabalham hoje. sounds more general and less idiomatic in many contexts
• A equipe trabalha hoje. sounds more specifically like a team

Normally, no.

When pessoal means the people / the staff / the group, the usual expression is o pessoal, treated as a singular collective noun.

So you should learn it as a set expression:

• o pessoal

Even though it refers to multiple people, you do not normally pluralize it in this meaning.

Yes, very often.

In Brazilian Portuguese, o pessoal frequently refers to:

• the staff
• the employees
• the people in a certain department
• your coworkers
• the group you and the listener both know

For example, at a business someone might say:

• O pessoal do financeiro trabalha hoje. = The finance staff is working today.
• O pessoal do escritório chega cedo. = The office staff arrives early.

So in many contexts, o pessoal is a practical way to refer to a known group without naming every person.