Qué torpe soy: he vuelto a olvidar la contraseña.

Because Spanish usually puts qué + adjective at the front in exclamations:

• ¡Qué torpe soy! = How clumsy/stupid I am!

Starting with soy would sound unnatural here. Spanish often front-loads the emotional part of the sentence in exclamations.

It has an accent because it is being used in an exclamative way:

• ¡Qué torpe soy! = How clumsy I am!

This is similar to questions and exclamations, where qué usually has an accent. Compare:

• Qué torpe soy = exclamative use
• El libro que tengo = relative pronoun, no accent

So the accent helps show that qué is not just that/which, but what/how in an exclamation.

Torpe can mean several related things, depending on context:

• clumsy
• awkward
• slow / inept
• sometimes stupid in a mild, self-critical way

In this sentence, because the speaker forgot a password, torpe is more like:

• I’m so stupid
• How dumb/clumsy of me
• I’m so useless

It is not necessarily a strong insult; it often sounds like everyday self-criticism.

Break it into parts:

• he = I have
• vuelto = past participle of volver
• volver a + infinitive = to do something again
• olvidar = to forget

So:

• he vuelto a olvidar = I have forgotten again
• more literally, I have returned to forgetting

This structure is very common in Spanish:

• He vuelto a llegar tarde. = I’ve arrived late again.
• Ha vuelto a llamar. = He/She has called again.

Because the expression is fixed: volver a + infinitive.

It means to do something again.

Examples:

• Volví a leer el mensaje. = I read the message again.
• Vamos a intentarlo otra vez is possible, but volver a intentarlo is another very common way to say try again.

So volver a olvidar is not optional grammar; the a is part of the structure.

Because the subject is yo.

The present perfect of haber is:

• yo he
• tú has
• él/ella ha
• nosotros/as hemos
• vosotros/as habéis
• ellos/ellas han

So:

• he vuelto = I have again...
• ha vuelto = he/she has again...

Since the speaker is talking about themselves, he is correct.

In Spain, the present perfect is very commonly used for recent past actions that still feel connected to the present.

So in Spain, these can differ a bit:

• He vuelto a olvidar la contraseña. = I’ve forgotten the password again.
• Olvidé la contraseña. = I forgot the password.

The first often sounds more connected to right now: the problem is still relevant. That fits this sentence very well.

In many parts of Latin America, the simple past (olvidé) may be used more often in the same situation.

Yes. That is also correct.

Two common ways to say again here are:

• He vuelto a olvidar la contraseña
• He olvidado otra vez la contraseña

The version with volver a + infinitive is often especially natural when emphasizing repetition of the action itself.

Both mean basically the same thing.

Because contraseña is a feminine noun in Spanish:

• la contraseña = the password

Like all nouns in Spanish, it has grammatical gender, and the article must match:

• una contraseña
• la contraseña

You just have to learn the noun together with its article.

Mostly it means password, but it can also mean code word, watchword, or passphrase, depending on context.

In modern everyday use, people very often use it for digital passwords:

• la contraseña del correo
• la contraseña del Wi‑Fi
• la contraseña de la cuenta

So in this sentence, it most naturally means a login password.

The colon links the two parts like this:

• Qué torpe soy → emotional reaction
• he vuelto a olvidar la contraseña → explanation of why

So it works like:

• How stupid I am: I’ve forgotten the password again.

It is a stylistic way to connect an exclamation with the reason behind it.

A full punctuation version could also be:

• ¡Qué torpe soy! He vuelto a olvidar la contraseña.

Both are understandable.

In fully standard punctuation, yes, you would often write:

• ¡Qué torpe soy: he vuelto a olvidar la contraseña! or
• ¡Qué torpe soy! He vuelto a olvidar la contraseña.

Spanish normally uses both opening and closing exclamation marks: ¡ !

However, in informal writing, people sometimes omit them, especially in messages or online writing.

Yes. It works perfectly as a complete sentence:

• ¡Qué torpe soy!

That alone means something like:

• I’m so clumsy/stupid.
• How silly of me.

The second part just explains what happened:

• he vuelto a olvidar la contraseña

The given sentence is correct and natural. But a very common alternative is:

• Qué torpe soy: se me ha vuelto a olvidar la contraseña.

This uses se me ha olvidado, which is extremely common in Spanish for forgetting things. It sounds a bit less direct, almost like:

• The password has slipped my mind again
• I’ve gone and forgotten the password again

So:

• he vuelto a olvidar la contraseña = correct, direct
• se me ha vuelto a olvidar la contraseña = also very natural, often very idiomatic

The basic order is:

• he = auxiliary verb
• vuelto = past participle
• a olvidar = infinitive phrase
• la contraseña = object

So literally:

• I have returned to forget the password

But in natural English:

• I’ve forgotten the password again

Spanish often builds these verbal chains in a way that looks longer than English, but the meaning is straightforward once you recognise the pattern volver a + infinitive.