Ver a mi hija más tranquila hace que yo también me relaje y hable con más calma.

Because ver a mi hija más tranquila acts as the subject of the sentence.

In English, we can do something similar with Seeing my daughter calmer... or To see my daughter calmer.... In Spanish, the infinitive ver can function like a noun-like action:

• Ver a mi hija más tranquila = Seeing my daughter calmer

So the structure is:

• Ver a mi hija más tranquila = the thing that causes something
• hace que... = makes it so that...

In other words, the whole first part is the subject of hace.

That is the personal a.

In Spanish, when the direct object is a specific person (or sometimes a pet treated like a person), you usually put a before it:

• Veo a mi hija
• Conozco a Juan
• Escucho a la profesora

So:

• ver a mi hija = to see my daughter

This a does not mean to here. It is just a grammar marker used with personal direct objects.

Because tranquila describes mi hija, which is feminine singular.

Spanish adjectives usually agree with the noun they describe:

• hijo tranquilo = calm son
• hija tranquila = calm daughter

Here:

• mi hija = feminine singular
• so the adjective must be tranquila

And because it says más tranquila, it means calmer or more relaxed/calm.

It means calmer, more relaxed, or more at ease.

Literally, it is more calm, but in natural English we would usually say:

• Seeing my daughter calmer...
• Seeing my daughter more relaxed...

It suggests a change or comparison, even if the comparison is only implied. For example, compared with before, she now seems less upset or less nervous.

Hace que means something like:

• makes
• causes
• leads to
• results in

So:

• Ver a mi hija más tranquila hace que...
• Seeing my daughter calmer makes it so that...

A very literal breakdown would be:

• hace que yo también me relaje y hable con más calma
• makes it so that I also relax and speak more calmly

This is a very common Spanish structure:

• hacer que + subjunctive

Because they come after hace que.

In Spanish, when something causes or brings about another action, the verb after hacer que is normally in the subjunctive:

• Esto hace que me sienta mejor.
• Su actitud hace que todos estén tranquilos.

So here:

• hace que yo también me relaje y hable con más calma

The forms are:

• me relaje = present subjunctive of relajarse
• hable = present subjunctive of hablar

Even though English would often just use a normal present form, Spanish uses the subjunctive after this trigger.

Because after hace que, Spanish requires the subjunctive, not the indicative.

Compare:

• Me relajo = I relax / I am relaxing → indicative
• Hace que me relaje = It makes me relax → subjunctive

So me relaje is not past tense here. It is present subjunctive.

That is a very common point of confusion, because forms like hable, relaje, coma, etc. may look unfamiliar at first.

Because it is coordinated with me relaje and depends on the same trigger: hace que.

So the sentence is really:

• hace que yo también me relaje
• y (hace que yo también) hable con más calma

The second hace que is not repeated, but it still applies.

That is why both verbs are in the same mood:

• me relaje
• hable

Because the verb is relajarse, which means to relax or to become relaxed.

In this sentence:

• me relaje = I relax / I become relaxed

The me refers back to the speaker. It is not a separate object meaning me in the English sense of someone relaxes me. Instead, it is part of the reflexive/pronominal verb.

Compare:

• relajar algo = to relax something
• relajarse = to relax, to unwind, to become relaxed

So here the meaning is that the speaker also becomes calmer.

Yes, it is grammatically optional, because the verb ending already shows the subject.

• me relaje already tells us it is I
• hable also matches I

But Spanish often includes subject pronouns for emphasis, clarity, or contrast.

Here yo también adds a slight sense of:

• I too
• I as well
• I also

So it is not required, but it sounds natural if the speaker wants to emphasize that the daughter becomes calmer, and as a result, the speaker also does.

También means also or too.

Here it shows that the speaker’s reaction happens in addition to the daughter being calmer:

• my daughter is calmer
• I also relax and speak more calmly

With yo también, the sentence highlights that the speaker is affected as well.

Because con más calma is much more natural and idiomatic.

Spanish often prefers a phrase like:

• hablar con calma = to speak calmly
• hablar con más calma = to speak more calmly / more calmly than before

Although calmadamente exists, it is less common and can sound more formal or less natural in everyday speech.

So:

• hable con más calma = very natural Spanish

Literally, it means with more calm.

In natural English, that usually becomes:

• more calmly
• in a calmer way

So:

• hable con más calma = I speak more calmly

Spanish often uses con + noun where English would prefer an adverb.

Yes. Más usually implies a comparison, even if the second part is not stated explicitly.

So:

• mi hija más tranquila = my daughter calmer than before / calmer than she was
• hable con más calma = I speak more calmly than before / than in the previous situation

Spanish often leaves that comparison unstated when it is obvious from context.

Not very naturally.

A very literal version would be:

• Seeing my daughter calmer makes it so that I also relax and speak with more calm.

That is understandable, but natural English would usually be something like:

• Seeing my daughter calmer helps me relax too and speak more calmly.
• Seeing my daughter more relaxed makes me relax too and speak more calmly.

So the Spanish structure is normal Spanish, but a more natural English translation usually needs some adjustment.

Because the sentence is not mainly expressing when something happens. It is expressing what causes something.

• Ver a mi hija más tranquila hace que... = Seeing my daughter calmer makes...

If you used al ver, it would shift more toward when/upon seeing:

• Al ver a mi hija más tranquila, yo también me relajo...

That version is also possible, but it has a slightly different feel. The original focuses more clearly on the idea of seeing her calmer as the thing that causes the result.

Hija specifically means daughter.

If you wanted child, you would usually say:

• hijo = son
• hija = daughter
• hijo/hija can sometimes mean child in a family sense, but on its own hija is definitely feminine: daughter

So in this sentence, the speaker is talking about his or her daughter.