Los farolillos iluminan la plaza.

Because Spanish nouns usually need an article much more often than English nouns do.

• los = the for a masculine plural noun
• la = the for a feminine singular noun

Here:

• farolillos is masculine plural, so it takes los
• plaza is feminine singular, so it takes la

So:

• los farolillos = the lanterns
• la plaza = the square

Because the noun is farolillo, and the ending -s makes it plural.

• singular: el farolillo
• plural: los farolillos

The verb also matches this plural subject:

• ilumina = lights / illuminates (singular subject)
• iluminan = light / illuminate (plural subject)

So Los farolillos iluminan... means the subject is they: the lanterns.

Farolillo is a diminutive form of farol.

• farol = lantern / streetlamp / lamp, depending on context
• farolillo = small lantern, little lantern, decorative lantern

In Spain, farolillos often suggests small decorative lanterns, especially the kind used in festivals, streets, fairs, or celebrations.

So this word is not just about size; it can also give a more familiar or picturesque feeling.

Because the verb is iluminar.

Its present tense form for ellos/ellas/ustedes is:

• yo ilumino
• tú iluminas
• él/ella ilumina
• nosotros iluminamos
• vosotros ilumináis
• ellos/ellas iluminan

So Los farolillos iluminan la plaza is correct because los farolillos is a third-person plural subject.

A common learner mistake is to try iluminan, but the correct stem is ilumin-, from iluminar.

Because Spanish verbs already contain the subject and tense information inside the verb form itself.

In English, we might think in terms of:

• The lanterns illuminate the square
• or The lanterns do illuminate the square for emphasis

In Spanish, iluminan already means they illuminate. You do not need an extra helping verb like do in a normal affirmative sentence.

In this sentence:

• Los farolillos = the subject = the thing doing the action
• iluminan = the verb
• la plaza = the direct object = the thing receiving the action

So the structure is:

Subject + Verb + Object

This is the most basic and common Spanish word order, just like in English.

Yes. Spanish is more flexible than English with word order.

The neutral, most straightforward order is:

• Los farolillos iluminan la plaza.

But you could also hear:

• La plaza la iluminan los farolillos.

That version puts more focus on la plaza. Spanish often changes word order for emphasis, rhythm, or style.

Still, for learners, the original Subject + Verb + Object order is the safest and clearest pattern to use.

Because la plaza is a direct object, but it is not a person.

Spanish uses the personal a mainly before specific people (and sometimes pets or personified beings).

Examples:

• Veo la plaza. = I see the square. → no a
• Veo a María. = I see María. → uses a

So in Los farolillos iluminan la plaza, there is no a because la plaza is a place, not a person.

In most of Spain today, ll is pronounced very similarly to y.

So farolillos is usually pronounced roughly like:

• fa-ro-LEE-yos

A more careful guide:

• fa-ro-LEE-yos

However, pronunciation varies by region:

• In most modern Spanish, ll and y sound the same
• In some areas, ll may have a slightly different sound

For a learner of Spain Spanish, pronouncing ll like the y in yes is a good practical choice.

Because Spanish often uses the definite article where English may or may not use it.

Here, la plaza sounds natural because it refers to the square, understood as a specific place in the scene.

Spanish generally prefers:

• iluminan la plaza rather than
• iluminan plaza ❌

Leaving out the article here would sound incomplete or unnatural.

Usually, yes. Plaza often means a town square, public square, or open urban space.

But it can carry slightly different associations depending on context:

• a main square in a town
• a public open area
• sometimes a plaza in the sense of a broad pedestrian space

So in this sentence, la plaza is best understood as the square or the town square.

Normally, no. In standard Spanish, that would sound unnatural in a simple sentence like this.

Spanish usually needs the article with common nouns when speaking about specific things:

• Los farolillos iluminan la plaza. ✅

Without the article, it might only work in very special contexts, such as:

• headlines
• poetry
• signs
• very stylized writing

For everyday Spanish, keep los.

Yes, in many contexts alumbran could work.

• iluminar = to illuminate, to light up
• alumbrar = to light, to illuminate

The difference is often one of style and nuance:

• iluminar can sound a bit more neutral or descriptive
• alumbrar can sound a bit more traditional or literary in some contexts, though it is still common

So:

• Los farolillos iluminan la plaza.
• Los farolillos alumbran la plaza.

Both are possible, though iluminan is very clear and straightforward for learners.