Fala baixinho, por favor, porque o bebé está a dormir.

Yes. Fala is the informal singular imperative of falar (to speak), used when talking to one person you would address as tu.

So Fala baixinho means Speak softly / Talk quietly.

A few useful comparisons:

• Fala baixinho. = informal, to one person
• Fale baixinho. = polite/formal, to one person
• Falem baixinho. = to more than one person

In this sentence, the speaker is telling someone directly to lower their voice.

Portuguese often leaves out subject pronouns when they are clear from the verb form.

So instead of saying:

• Tu fala baixinho — which would actually be wrong here

Portuguese simply says:

• Fala baixinho

The verb form already shows that this is a command to you (informal singular). In Portuguese, this omission is very normal and natural.

Baixinho here means softly, quietly, or in a low voice.

It comes from baixo (low) with the diminutive ending -inho, which often adds a sense of:

• smallness
• softness
• affection
• gentleness

So falar baixinho is a very common and natural expression meaning to speak softly.

It does not literally mean a little low in a mechanical way; it is just the normal idiomatic way to say speak quietly/softly.

You might be understood, but fala baixinho is the more natural and idiomatic choice in this context.

Compare:

• falar baixinho = speak softly/quietly
• falar baixo = speak low / in a low voice

Both can exist, but baixinho sounds more natural when asking someone not to make noise, especially in a situation like a baby sleeping.

So for learners, falar baixinho is the safest and most natural phrase to remember.

Portuguese often uses the definite article (o, a, os, as) in places where English would not.

So:

• o bebé = the baby

Even if English might sometimes just say baby in a general family situation, Portuguese commonly keeps the article.

This is very normal in European Portuguese. You will see this kind of article use a lot with everyday nouns.

This is a very important European Portuguese pattern.

In European Portuguese, the usual way to express an action in progress is:

• estar a + infinitive

So:

• está a dormir = is sleeping
• literally: is at sleeping

In Brazilian Portuguese, the more common form is:

• está dormindo

Both refer to an ongoing action, but está a dormir is the standard and natural form in Portugal.

More examples:

• Estou a estudar. = I am studying.
• Estamos a comer. = We are eating.

Here porque means because.

So:

• porque o bebé está a dormir = because the baby is sleeping

This is the conjunction used to give a reason.

A common learner difficulty is mixing it up with the question form. Very simply:

• porque = because
• por que? = why?

So:

• Fala baixinho, por favor, porque o bebé está a dormir.
• Speak softly, please, because the baby is sleeping.

Por favor is quite flexible in Portuguese. It can appear in different positions without changing the core meaning.

In this sentence:

• Fala baixinho, por favor, porque o bebé está a dormir.

it softens the request politely.

You could also hear:

• Por favor, fala baixinho, porque o bebé está a dormir.
• Fala baixinho porque o bebé está a dormir, por favor.

The version with por favor after the request sounds very natural.

The comma helps separate the request from the reason that follows.

Structure:

• Fala baixinho, por favor, = request
• porque o bebé está a dormir. = explanation/reason

In short everyday writing, punctuation can vary a bit, but the commas here make the sentence clearer and more natural to read.

Yes, bebé is the standard spelling in European Portuguese.

In Brazilian Portuguese, the usual spelling is:

• bebê

They mean the same thing: baby.

The difference is mainly orthographic and reflects pronunciation differences between the two varieties.

So if you are learning Portuguese from Portugal, bebé is the form you should use.

In European Portuguese, connected speech is often reduced more than English speakers expect.

Roughly:

• está sounds like shtá or shtah
• a is usually a very weak vowel
• dormir sounds roughly like dor-MEER, but with European Portuguese vowel quality

So the whole phrase está a dormir may sound faster and more compressed than its spelling suggests.

A learner should especially notice:

• the reduced a
• the sharper, more closed rhythm of European Portuguese
• unstressed vowels often becoming weak

You do not need to pronounce every vowel as clearly as in English spelling-based reading.

Yes. If you are speaking politely or formally to one person, you would normally say:

• Fale baixinho, por favor, porque o bebé está a dormir.

The only change is:

• fala → fale

Everything else stays the same.

So:

• Fala baixinho... = informal
• Fale baixinho... = formal/polite

Yes, it can be changed, though the original order is very natural.

For example:

• Porque o bebé está a dormir, fala baixinho, por favor.

This is still correct and understandable, but it feels a bit more marked because it starts with the reason.

The original version is more neutral for everyday speech:

• Fala baixinho, por favor, porque o bebé está a dormir.

It first gives the request, then explains why. That is a very common and natural order.