Se sbagli una parola, è del tutto normale.

Se means if.

It introduces a condition:

• Se sbagli una parola = If you get a word wrong / If you make a mistake with a word

This is a very common Italian structure:

• Se studi, impari. = If you study, you learn.
• Se hai tempo, chiamami. = If you have time, call me.

In this sentence, the condition comes first, and the result comes after it.

Because sbagli is the second person singular form of the verb sbagliare in the present tense.

The verb pattern is:

• io sbaglio = I make mistakes / I am wrong
• tu sbagli = you make mistakes / you are wrong
• lui/lei sbaglia = he/she makes mistakes
• noi sbagliamo
• voi sbagliate
• loro sbagliano

So se sbagli una parola is talking to you informally:
if you get a word wrong.

Here sbagliare means something like:

• to make a mistake
• to get something wrong
• to say something incorrectly

With una parola, it means you used or said a word incorrectly.

Depending on context, sbagliare can also mean:

• to be mistaken
• to choose the wrong thing
• to miss a target

Examples:

• Hai sbagliato risposta. = You got the answer wrong.
• Sbaglio o è tardi? = Am I mistaken, or is it late?
• Ho sbagliato treno. = I got the wrong train.

Because in Italian, sbagliare can take a direct object.

So:

• sbagliare una parola = to get a word wrong
• sbagliare il nome = to get the name wrong
• sbagliare risposta or sbagliare una risposta = to get an answer wrong

English often uses different structures, such as:

• make a mistake with a word
• get a word wrong

Italian simply uses the noun directly after the verb.

Yes, you can, but usually you do not need to.

Italian often leaves out subject pronouns because the verb ending already shows the subject:

• sbagli already tells us it means you.

So the normal version is:

• Se sbagli una parola...

You might add tu only for emphasis or contrast:

• Se tu sbagli una parola, non è un problema; se la sbaglio io, mi correggono subito.

So in most ordinary situations, leaving out tu sounds more natural.

It is informal, because sbagli is the tu form.

If you wanted to say the same thing formally to one person, you would normally use Lei and the verb form sbaglia:

• Se sbaglia una parola, è del tutto normale.

That is the polite singular form.

So:

• se sbagli = if you get it wrong, informal
• se sbaglia = if you get it wrong, formal

The comma separates the if-clause from the main clause:

• Se sbagli una parola, = if you get a word wrong
• è del tutto normale. = it is completely normal

In Italian, it is very common to use a comma when the conditional clause comes first.

If the order were reversed, the comma might be omitted more often:

• È del tutto normale se sbagli una parola.

Both versions are natural.

Because è is the verb is from essere.

• è = is

The accent is important because e without an accent usually means and.

Compare:

• è normale = it is normal
• e normale = incorrect here; this would look like and normal

So the accent helps distinguish two different words:

• è = is
• e = and

Del tutto means:

• completely
• entirely
• totally

So:

• è del tutto normale = it is completely normal

This is a common fixed expression. You can use it in many contexts:

• È del tutto possibile. = It is completely possible.
• Sono del tutto d’accordo. = I completely agree.
• Non è del tutto chiaro. = It is not completely clear.

Literally, it comes from di + il tutto, but as a learner, it is best to remember del tutto as one expression meaning completely / entirely.

Because after essere you normally use an adjective, not an adverb.

• è normale = it is normal

Here normale describes the situation.

Normalmente means normally, which is an adverb. That would change the meaning:

• È normale. = It is normal.
• Normalmente... = Normally...

So è del tutto normale is correct because normale is describing it.

It uses the present indicative:

• se sbagli = if you make a mistake / if you get it wrong

This is a very common pattern for real or general conditions:

• Se piove, resto a casa. = If it rains, I stay home.
• Se studi, migliori. = If you study, you improve.

So this sentence is not talking about an unreal or impossible situation. It means something like:

• whenever this happens
• if this happens, that is normal

Yes. A few natural alternatives are:

• Se sbagli una parola, è assolutamente normale.
• Se commetti un errore in una parola, è del tutto normale.
• È del tutto normale sbagliare una parola.
• Sbagliare una parola è del tutto normale.

These are similar, but not identical in tone:

• Se sbagli una parola... directly addresses the listener.
• È del tutto normale sbagliare una parola. is more general.
• commettere un errore sounds a bit more formal than sbagliare.

A simple pronunciation guide is:

Se sbagli una parola, è del tutto normale.
seh ZBAH-lyee OO-nah pah-ROH-lah, eh del TOOT-toh nor-MAH-leh

A few helpful points:

• gli in sbagli sounds like the lli in a softened version of million, though not exactly the same.
• è is an open eh sound.
• tt in tutto is held a little longer than a single t.
• Stress falls on:
  • paRÒla
  • normÀle

If you want to sound natural, keep the rhythm smooth and let the sentence rise slightly after Se sbagli una parola and then settle on normale.