Si una palabra empieza con mayúscula, yo la copio también con mayúscula.

Here si means if.

It does not have an accent because si = if is a conjunction. Spanish also has sí with an accent, which usually means yes or himself/herself/itself in certain expressions.

• si = if
• sí = yes

So in Si una palabra empieza..., the sentence is introducing a condition: If a word starts...

Because palabra is a feminine noun in Spanish, so it takes the feminine article una.

• una palabra = a word

This can feel surprising to English speakers because words ending in -a are often feminine, but there are exceptions in Spanish. In this case, palabra is simply feminine and must agree with:

• una
• la
• mayúscula when it refers back to it

Empieza comes from the verb empezar, which means to begin or to start.

So:

• una palabra empieza con mayúscula = a word starts with a capital letter

This is a stem-changing verb in the present tense:

• yo empiezo
• tú empiezas
• él/ella empieza

The change is e → ie in most present forms.

Spanish commonly uses con mayúscula to mean with a capital letter or in uppercase at the beginning.

So:

• empieza con mayúscula = starts with a capital letter

You may also hear:

• empieza con letra mayúscula

That is more explicit, because letra mayúscula literally means capital letter, but con mayúscula is very natural and common.

Here mayúscula refers to a capital letter.

Spanish often contrasts:

• mayúscula = capital letter / uppercase
• minúscula = lowercase letter

So:

• con mayúscula = with a capital letter
• con minúscula = with a lowercase letter

In this sentence, it does not mean that the whole word is in uppercase, only that it begins with a capital letter.

The first part, Si una palabra empieza con mayúscula, is a conditional clause placed before the main clause. In Spanish, it is normal to put a comma after this kind of introductory clause.

So the structure is:

• Si..., yo la copio...

This is similar to English:

• If a word starts with a capital letter, I copy it with a capital letter too.

If the order were reversed, the comma would usually disappear:

• Yo la copio también con mayúscula si una palabra empieza con mayúscula.

Yes, yo is often optional in Spanish, because the verb ending already shows the subject:

• copio already means I copy

So the sentence could simply be:

• Si una palabra empieza con mayúscula, la copio también con mayúscula.

Including yo adds emphasis or clarity. It can suggest something like:

• I copy it that way too
• As for me, I also copy it with a capital

So yo is not wrong at all, but it is slightly more explicit or emphatic than necessary.

La is a direct object pronoun meaning it, and it refers to una palabra.

Since palabra is feminine, the pronoun is feminine too:

• la palabra → la

So:

• yo la copio = I copy it

Spanish object pronouns must agree in gender and number with the noun they replace:

• la = feminine singular
• lo = masculine singular
• las = feminine plural
• los = masculine plural

In Spanish, direct object pronouns usually go before a conjugated verb.

So:

• la copio = I copy it

This is the normal position with a finite verb like copio.

English says:

• I copy it

Spanish says:

• la copio

The pronoun can attach to the end only in certain cases, such as with infinitives, gerunds, and affirmative commands:

• voy a copiarla
• estoy copiándola
• cópiala

But here, with the normal present tense, la goes before the verb.

También means also or too.

Here it means that the speaker copies the word in the same way: if the original starts with a capital letter, the speaker also writes it with a capital letter.

So:

• yo la copio también con mayúscula = I also copy it with a capital letter / I copy it with a capital letter too

It reinforces the idea of matching the original form.

Yes, Spanish allows some flexibility with también, although some positions sound more natural than others.

For example:

• Si una palabra empieza con mayúscula, yo la copio también con mayúscula.
• Si una palabra empieza con mayúscula, yo también la copio con mayúscula.
• Si una palabra empieza con mayúscula, también la copio con mayúscula.

These are all understandable, but the emphasis shifts slightly:

• yo también emphasizes I too
• la copio también con mayúscula emphasizes I copy it that way too

The original sentence sounds very natural.

It is repeated to make the meaning very clear: if the original word begins with a capital, the speaker reproduces it with a capital too.

Without the repetition, the sentence could be shorter, but less explicit. For example:

• Si una palabra empieza con mayúscula, yo también la copio así.

That is possible, but así is more general. The original repeats con mayúscula to state the rule directly and clearly.

It is talking about words in general.

Even though Spanish uses the singular:

• Si una palabra... = If a word...

the meaning is generic, just like English often uses singular nouns for general statements:

• If a word starts with a capital letter...

So this is a general rule, not a comment about one particular word.

Yes. Comienza from comenzar can also mean begins or starts.

So this would also be correct:

• Si una palabra comienza con mayúscula, yo la copio también con mayúscula.

Both empieza and comienza are natural. Empezar is often slightly more common in everyday speech, but both are standard Spanish.

You would use minúscula:

• Si una palabra empieza con minúscula, yo la copio también con minúscula.

That means:

• If a word starts with a lowercase letter, I copy it with a lowercase letter too.

So the contrast is:

• mayúscula = capital letter
• minúscula = lowercase letter