Confirmé el hecho.

Confirmé is the 1st person singular preterite (also called pretérito indefinido) of confirmar.

So it means I confirmed.

• yo confirmé = I confirmed
• infinitive: confirmar = to confirm

This tense is used for a completed action in the past.

The accent mark shows both pronunciation and meaning.

• confirmé = I confirmed (preterite)
• confirme = a different form, for example in the subjunctive or a formal command context

The accent tells you the stress falls on the last syllable:
con-fir-mé

Without the accent, it would not be the same written form.

Because confirmé is past tense, while confirmo is present tense.

• confirmo el hecho = I confirm the fact / I am confirming the fact
• confirmé el hecho = I confirmed the fact

So if the action already happened and is finished, confirmé is the correct form.

El hecho means the fact.

The noun hecho can mean different things depending on context, including:

• fact
• event
• deed
• thing that happened

In this sentence, the most natural meaning is the fact.

Spanish often uses the definite article where English also uses the.

So:

• el hecho = the fact

In this sentence, it refers to a specific fact already understood from the context.

If you just said Confirmé hecho, that would be ungrammatical in normal Spanish.

Yes. Hecho is the past participle of hacer (done / made), but it can also function as a noun.

So:

• he hecho = I have done
• un hecho = a fact

In Confirmé el hecho, hecho is a noun, not a verb form.

No. This is a very normal Spanish sentence pattern:

verb + direct object

• Confirmé = verb
• el hecho = direct object

Spanish often allows flexible word order, but this version is the most neutral and natural.

Yes. That would be the present perfect:

• Confirmé el hecho = I confirmed the fact
• He confirmado el hecho = I have confirmed the fact

In Spain, the present perfect is often used for actions connected to the present or very recent time.
The preterite confirmé sounds more like a completed past action, especially if it is seen as finished and separated from the present.

A simple pronunciation guide is:

con-feer-MEH el EH-cho

More closely:

• confirmé → /kom-fir-MEH/
• el → /el/
• hecho → /EH-cho/

In standard Spain Spanish, the h is silent, so hecho begins with the vowel sound e.

Often yes, but not always in exactly the same way as English.

Confirmar usually means:

• to confirm
• to verify
• to establish as true

Depending on context, Spanish might also use verbs like:

• verificar
• comprobar
• corroborar

But for a sentence like Confirmé el hecho, I confirmed the fact is a straightforward and natural match.

No. Spanish usually omits the subject pronoun when it is clear from the verb ending.

• Confirmé el hecho = I confirmed the fact
• Yo confirmé el hecho = I confirmed the fact

Both are correct, but yo is only added for emphasis, contrast, or clarity.

It is grammatical and understandable, but in everyday speech it may sound a bit formal or context-dependent.

Native speakers might more often say things like:

• Confirmé que era cierto. = I confirmed that it was true.
• Confirmé los hechos. = I confirmed the facts.
• Se confirmó el hecho. = The fact was confirmed / the event was confirmed.

So your sentence is correct, but whether it sounds natural depends on the situation and what exactly el hecho refers to.