La policia és aquí.

Because Catalan normally says la policia for the police. In this sentence, policia is not being used like a job title; it refers to the police as a group or institution, so the definite article is natural.

Compare:

• La policia és aquí = The police are here
• És policia = He/She is a police officer

So in the sentence you gave, dropping la would sound wrong.

Because la policia is grammatically singular in Catalan.

Even though English uses the police are, Catalan treats policia here as a singular collective noun, so it takes the singular verb és.

So:

• La policia és aquí = literally The police is here, but naturally The police are here
• Els policies són aquí = The police officers are here

Usually it means the police as a group, the police force, or the police presence in general.

If you mean one officer, you would normally say:

• un policia = a male police officer / a police officer
• una policia = a female police officer / a police officer

So la policia is not usually understood as one individual person.

No. The feminine article here is about grammatical gender, not the real-life sex of the people involved.

In this sentence, la policia is a feminine singular noun, but it can refer to male officers, female officers, or a mixed group. It is just the grammatical form Catalan uses for this collective noun.

In Catalan, ser can be used for simple location or presence, especially with words like aquí.

So La policia és aquí is a normal, natural sentence meaning The police are here.

You may also hear La policia està aquí, especially in some contexts or varieties, but és aquí is perfectly standard and very common for simple presence.

A useful comparison is:

• Ja és aquí = It’s here / He’s here / She’s here
• Ja està aquí can also occur, but it may sound a bit more focused on being physically present or staying there

For a learner, the safest thing is: this sentence with és is correct and idiomatic.

Aquí means here, near the speaker.

It is the most common standard form. In some regions, especially Valencian, you may also hear ací, which also means here.

So:

• aquí = here
• ací = here, in some regional varieties

Both are correct, but aquí is the form most learners will see most often.

A simple English-friendly guide is:

luh poo-lee-see-uh ez uh-KEE

A few notes:

• policia has four syllables: po-li-ci-a
• the stress falls on ci: po-li-CI-a
• aquí is stressed on the last syllable: a-QUÍ

If you want a rough IPA for standard Central Catalan, it is:

[lə puliˈsi.ə ˈez əˈki]

The accents are there because of Catalan spelling rules.

• és has an accent because it is the verb is, and the accent also helps distinguish it from es, which is a different word
• aquí has an accent because the stress is on the final syllable
• policia does not need an accent because its stress already follows the normal stress rules of Catalan spelling

So the accents are not random; they tell you something about pronunciation and, sometimes, meaning.

Yes, if the context already makes it clear who or what you are talking about.

For example, if everyone already knows you mean the police, then És aquí can mean They’re here, He’s here, She’s here, or It’s here, depending on context.

But if you want to name the subject explicitly, you would normally say the full sentence:

La policia és aquí

If you want to talk about the officers as separate people rather than the police as a collective force, you can use a plural noun:

• Els policies són aquí = The police officers are here
• Els agents són aquí = The officers are here

But for the general idea The police are here, the most natural sentence is still:

La policia és aquí

The normal, neutral order is:

La policia és aquí

You can move aquí for emphasis in some contexts, but that is less neutral and more marked. For a learner, the standard order above is the best one to use.

So if you simply want to say The police are here, stick with:

La policia és aquí