Oggi siamo fortunati.

Italian often drops subject pronouns when the verb already makes the subject clear.

Here, siamo means we are, so noi is not necessary.

• Oggi siamo fortunati. = Today we are lucky.
• Oggi noi siamo fortunati. is also possible, but it adds emphasis, like We are lucky today.

Siamo is the 1st person plural form of essere (to be) in the present tense.

So:

• io sono = I am
• tu sei = you are
• lui/lei è = he/she is
• noi siamo = we are
• voi siete = you all are
• loro sono = they are

In this sentence, siamo means we are.

Because fortunati agrees with the subject we.

In Italian, adjectives change form to match the noun or pronoun they describe in number and often gender.

Since the implied subject is noi (we), the adjective must be plural:

• fortunato = lucky, masculine singular
• fortunata = lucky, feminine singular
• fortunati = lucky, masculine plural or mixed group
• fortunate = lucky, feminine plural

So siamo fortunati means we are lucky if the group is all male or mixed.
If the group were all female, it would be:

• Oggi siamo fortunate.

Oggi means today, and putting it at the beginning is very natural in Italian. It sets the time right away.

• Oggi siamo fortunati. = Today we are lucky.

You can also say:

• Siamo fortunati oggi.

Both are correct, but starting with oggi puts a little more focus on today.

Yes. Italian word order is often more flexible than English word order.

These are all possible, depending on emphasis:

• Oggi siamo fortunati.
• Siamo fortunati oggi.
• Noi oggi siamo fortunati.

The most neutral and natural version here is Oggi siamo fortunati.

It can mean both lucky and fortunate, depending on context.

In everyday speech, fortunato/fortunata often corresponds to lucky:

• Sei fortunato. = You’re lucky.

In more formal or general contexts, it can also mean fortunate:

• Siamo fortunati ad avere questa opportunità. = We are fortunate to have this opportunity.

In Oggi siamo fortunati, lucky is the most natural English translation.

Usually, no. The normal word for lucky/fortunate in Italian is fortunato.

Fortunoso exists, but it usually means something more like eventful, full of twists, or adventurous, not simply lucky.

So for this sentence, fortunati is definitely the correct everyday choice.

A simple pronunciation guide is:

• oggi ≈ OJ-jee
• siamo ≈ SYAH-mo
• fortunati ≈ for-too-NAH-tee

A few helpful notes:

• In oggi, the gg sounds like the j in judge.
• In siamo, the ia blends together, not like two separate strong syllables.
• In fortunati, the stress is on na: for-tu-NA-ti.

Because fortunati is an adjective, not a noun here.

In siamo fortunati, the structure is:

• siamo = we are
• fortunati = lucky

Italian does not use an article in this kind of sentence, just as English does not say we are the lucky in this context.

Yes, very natural.

Oggi siamo fortunati is a normal, idiomatic way to say:

• Today we’re lucky
• We’re lucky today
• We’re in luck today

It could be used after something good happens, like finding parking, getting tickets, or having nice weather.

You would change both the verb and, if necessary, the adjective ending.

Examples:

• Oggi sono fortunato. = Today I am lucky.

  • said by a male speaker

• Oggi sono fortunata. = Today I am lucky.

  • said by a female speaker

• Oggi sono fortunati. = Today they are lucky.

  • masculine or mixed group

• Oggi sono fortunate. = Today they are lucky.

  • all-female group

Notice that sono can mean I am or they are; the context tells you which one it is.