Jo felicitaré l'oncle amb una abraçada, i la meva filla li farà un petó.

Yes. In Catalan, subject pronouns are often omitted because the verb ending already shows who the subject is.

So Felicitaré l'oncle... would already mean I will congratulate my/the uncle...

Including Jo adds emphasis, contrast, or clarity. It can sound like:

• I will congratulate the uncle...
• As for me, I will be the one to do it.

So here Jo is not required, but it is perfectly natural if the speaker wants a little emphasis.

Felicitaré is the future tense of felicitar.

• felicitar = to congratulate
• felicitaré = I will congratulate

It is formed from the infinitive plus the future ending:

• felicitar + é → felicitaré

This is a regular future formation in Catalan.

Because the masculine singular article el becomes l' before a word beginning with a vowel or silent h.

So:

• el + oncle → l'oncle

This is called elision.

Other examples:

• l'amic
• l'home
• l'àvia

Catalan often uses the definite article with nouns, including family terms, much more naturally than English does.

So l'oncle is normal Catalan. Depending on context, it may mean something like:

• the uncle
• my/our/the uncle in a context where everyone knows which uncle is meant

Catalan often relies on context more than English does here.

Amb una abraçada literally means with a hug.

It tells you how the congratulating will be done: by means of a hug, or accompanied by a hug.

So the structure is:

• felicitar algú = to congratulate someone
• felicitar algú amb una abraçada = to congratulate someone with a hug

This is a very natural way to express the idea.

In Catalan, possessives are usually used together with the definite article.

So:

• la meva filla = my daughter
• el meu germà = my brother
• la nostra casa = our house

This is different from English, where you normally do not use the with possessives.

So la meva filla is the normal Catalan pattern.

Li is an indirect object pronoun meaning:

• to him
• to her
• to you (formal singular), depending on context

In this sentence, it refers to l'oncle.

So the idea is:

• la meva filla li farà un petó
• my daughter will give him a kiss

Catalan often uses these object pronouns where English would simply leave the relationship understood from word order.

Yes, fer usually means to do or to make, but in Catalan it is also used in some fixed expressions.

Fer un petó is a common expression meaning:

• to give a kiss
• to kiss someone

So:

• li farà un petó = she will give him a kiss

Catalan also has the verb besar (to kiss), but fer un petó is very common and natural.

Because unstressed object pronouns in Catalan usually go before the conjugated verb.

So:

• li farà un petó

not usually:

• farà li un petó

This is the normal position for a clitic pronoun in a simple future tense clause.

Structure:

• li = to him/her
• farà = will make/do
• un petó = a kiss

Normally, li is needed because fer un petó a algú requires an indirect object, and Catalan very naturally expresses that with the pronoun.

In fact, Catalan often uses clitic pronouns even when the person is already understood or later repeated.

For example:

• La meva filla li farà un petó.
• La meva filla farà un petó a l'oncle.
• La meva filla li farà un petó a l'oncle.
  This last one is also possible, with pronoun doubling.

So li is not just optional decoration; it is a normal part of the sentence structure.

Because the sentence is describing what will happen later.

• felicitaré = I will congratulate
• farà = she will give / she will do

Catalan uses the simple future here in a very straightforward way, much like English will.

So the two actions are parallel:

• I will do one thing
• my daughter will do another thing

The sentence as given is very natural, but Catalan word order is somewhat flexible.

The basic order here is:

• Jo felicitaré l'oncle amb una abraçada
• i la meva filla li farà un petó

This is a neutral order: subject + verb + object + complement.

Some changes are possible for emphasis, but not everything can move freely. For example, li still normally stays attached to the verb area:

• La meva filla li farà un petó
• Un petó, la meva filla li farà would be much more marked and stylistic

So the original version is the best neutral model for a learner.

It is pronounced as one smooth unit, with the article joined to the noun:

• l'oncle

You do not pause between them.

The l' is just the shortened form of the article, so in speech it flows directly into oncle. The apostrophe is only written to show that the vowel of el has disappeared.