Lanzamos el proyecto hoy.

Spanish often leaves out subject pronouns because the verb ending already tells you who is doing the action.

• Lanzamos can mean we launch / we are launching / we launched
• So nosotros is not necessary

You could say Nosotros lanzamos el proyecto hoy, but that usually adds emphasis, contrast, or clarity:

• Nosotros lanzamos el proyecto hoy, no ellos.

Lanzamos is the first person plural form of lanzar.

That means it goes with nosotros/nosotras: we.

It can be:

• present indicative: we launch / we are launching
• also formally the same as the preterite form: we launched

So this is one of those Spanish forms where context matters.

Grammatically, it could be either, because the nosotros form is identical in the present and the preterite for regular -ar verbs.

Possible interpretations:

• We launch the project today
• We are launching the project today
• We launched the project today

However, in Spain, if you mean a completed action that happened earlier today, speakers often prefer:

• Hemos lanzado el proyecto hoy

So in Spain, Lanzamos el proyecto hoy is often more naturally understood as a present-time statement unless the context clearly makes it past.

In Spanish, articles are used more often than in English.

• proyecto is a masculine singular noun
• so the definite article is el

That gives you el proyecto = the project

Leaving out the article would usually sound incomplete here.

Nouns in Spanish have grammatical gender. Proyecto is masculine, so it takes:

• el proyecto
• un proyecto

The ending -o often suggests a masculine noun, and that is true here. But remember: grammatical gender does not mean the thing itself is male.

Yes. Spanish word order is flexible.

All of these are possible:

• Lanzamos el proyecto hoy
• Hoy lanzamos el proyecto
• El proyecto lo lanzamos hoy (more marked/emphatic)

The most neutral options are usually:

• Hoy lanzamos el proyecto
• Lanzamos el proyecto hoy

Putting hoy first often gives it a little more emphasis.

No. Lanzar literally means to throw, but it is also very commonly used in a figurative sense.

For example:

• lanzar un producto = to launch a product
• lanzar una campaña = to launch a campaign
• lanzar un proyecto = to launch a project

So this sentence uses a very normal business/professional meaning of lanzar.

In most of Spain, the z is pronounced like the th in think.

So lanzamos sounds roughly like:

• lan-THA-mos

A few notes:

• lan as in lawn, but shorter
• za = tha
• stress is on za: lan-THA-mos

In many parts of Latin America, the z would sound like an s instead.

Yes, but it changes the feel slightly.

• Lanzamos el proyecto hoy is a simple statement and can sound like a plan, announcement, or scheduled action.
• Estamos lanzando el proyecto hoy focuses more on the action being in progress or actively underway.

In many real situations, Spanish prefers the simple present where English might use be + -ing.

So Lanzamos el proyecto hoy is very natural.

Yes, but it is usually not necessary.

• Lanzamos el proyecto hoy = normal, natural
• Nosotros lanzamos el proyecto hoy = adds emphasis

You might add nosotros if:

• you want contrast: Nosotros lanzamos el proyecto hoy, ellos mañana
• you want to be especially clear
• you are stressing who is responsible

Without that kind of reason, Spanish usually drops the pronoun.