Por mucho que practique, todavía me cuesta hablar en voz alta en clase.

Por mucho que is a fixed expression meaning no matter how much or however much.

So:

• Por mucho que practique = No matter how much I practise
• It introduces a kind of concession: even if something happens a lot, the result in the main clause is still true.

It is very common in Spanish with this pattern:

• Por mucho que + subjunctive, ...

Examples:

• Por mucho que estudie, no lo entiendo.
  = No matter how much I study, I don’t understand it.
• Por mucho que lo intentes, no cambiará.
  = No matter how much you try, it won’t change.

Because por mucho que normally triggers the subjunctive.

Spanish uses the subjunctive after certain expressions when the speaker is not stating a simple fact, but presenting something as:

• hypothetical
• indefinite
• not enough to change the outcome
• part of a concessive idea

Here, Por mucho que practique does not mean I practise a lot as a plain fact. It means something more like:

• Even if I practise a lot
• No matter how much I may practise

That is why Spanish uses the present subjunctive practique.

This is just a spelling rule in Spanish.

The verb is practicar. In the present subjunctive, verbs ending in -car change spelling before e so that the sound stays the same.

• practicar
• yo form of present indicative: practico
• present subjunctive: practique

Why?

Because:

• ca sounds like ka
• but ce would sound like the / se depending on accent
• so Spanish writes que to keep the hard k sound

The same happens with many verbs:

• buscar → busque
• explicar → explique
• tocar → toque

So practique is pronounced roughly like prak-TEE-ke.

Costar often means to be difficult / to be hard for someone.

The structure is:

• A alguien le cuesta + infinitive

or more naturally:

• me cuesta + infinitive = I find it hard to...
• te cuesta + infinitive = you find it hard to...
• le cuesta + infinitive = he/she finds it hard to...

So:

• Me cuesta hablar = I find speaking difficult / It’s hard for me to speak

This is very natural Spanish.

More examples:

• Me cuesta madrugar.
  = I find it hard to get up early.
• Le cuesta concentrarse.
  = He/She finds it hard to concentrate.

Because the idea is built around to be difficult for someone, not around someone does difficulty.

In English, we often say:

• I find it hard to speak

But in Spanish, the grammar is closer to:

• Speaking is hard for me

That is why Spanish uses an indirect object pronoun:

• me = for me
• te = for you
• le = for him/her

So in me cuesta hablar:

• me = to me / for me
• cuesta = is difficult
• hablar = to speak

A more expanded version would be:

• A mí me cuesta hablar.

The a mí is optional and adds emphasis.

Because after costar in this structure, Spanish normally uses an infinitive to say what action is difficult.

Pattern:

• costar + infinitive

So:

• me cuesta hablar = I find it hard to speak
• me cuesta entender = I find it hard to understand
• me cuesta dormir = I find it hard to sleep

This is very similar to English to + verb, except Spanish uses the plain infinitive form directly.

Todavía means still.

It shows that the difficulty continues up to the present moment.

So the sentence is not just saying speaking aloud is hard, but that it remains hard even now:

• todavía me cuesta = it’s still hard for me

This fits well with the first part:

• Por mucho que practique... = no matter how much I practise...
• todavía me cuesta... = it’s still hard for me...

You could often replace todavía with aún in this sentence:

• Por mucho que practique, aún me cuesta...

In most everyday contexts, todavía and aún both mean still, though todavía is usually more common in normal conversation.

En voz alta means out loud or aloud.

It is a fixed expression:

• leer en voz alta = to read aloud
• hablar en voz alta = to speak out loud

Why alta?

Because alta agrees with voz, and voz is a feminine noun:

• la voz
• therefore alta

So literally:

• en voz alta = in a loud voice

You would not say en voz alto, because voz is feminine.

En clase usually means in class during the lesson, not necessarily just physically inside a classroom.

So:

• hablar en voz alta en clase = to speak out loud in class

It often refers to the classroom situation or lesson context.

Compare:

• Estoy en clase. = I’m in class.
• Estoy en la clase. = I’m in the classroom / in the class itself, with more focus on the specific place or group.

In this sentence, en clase is the natural choice because the idea is about speaking during class.

Yes, you could say something like:

• Aunque practique mucho, todavía me cuesta hablar en voz alta en clase.

That would also mean something like:

• Although / even if I practise a lot, I still find it hard to speak out loud in class.

But por mucho que practique is stronger and more idiomatic for no matter how much I practise.

The difference in feeling is roughly:

• aunque practique mucho = even if / although I practise a lot
• por mucho que practique = no matter how much I practise

So the original sentence emphasises the contrast more strongly.

Because Por mucho que practique is an introductory subordinate clause, and the main clause comes after it:

• Por mucho que practique,
• todavía me cuesta hablar en voz alta en clase.

In English, we also often use a comma after a long introductory clause:

• No matter how much I practise, I still find it hard...

So the comma helps separate:

1. the concessive clause
2. the main statement

Yes. Spanish word order is flexible.

The original sentence is very natural:

• Por mucho que practique, todavía me cuesta hablar en voz alta en clase.

You could also say:

• Todavía me cuesta hablar en voz alta en clase, por mucho que practique.

That is also correct, but it sounds a bit more dramatic or literary, because the main idea comes first and the concessive phrase is added afterwards.

The original order is probably the most neutral and standard for learners to copy.

It works perfectly well in Spain and also across the Spanish-speaking world.

Nothing in the sentence is uniquely Peninsular in grammar. These are all very general, widely used forms:

• por mucho que
• practique
• todavía
• me cuesta
• en voz alta
• en clase

A speaker in Spain would say it naturally, and so would many speakers in Latin America. The only small differences you might notice across regions would be pronunciation, not the grammar of this sentence.