La patrino preparas manĝon por la infanoj.

La is the definite article in Esperanto, meaning the.

So:

• la patrino = the mother
• la infanoj = the children

Esperanto has only one article, la. It does not change for singular/plural, gender, or case.

Also, Esperanto normally has no indefinite article. So:

• patrino = a mother or just mother
• la patrino = the mother

Because patro means father, while patrino means mother.

This is built with the feminine suffix -in-:

• patr- = parent/father root
• patro = father
• patrino = mother

This is a very common Esperanto pattern:

• frato = brother
• fratino = sister
• avo = grandfather
• avin(o) = grandmother

So patrino is literally female parent/father-root noun, which gives mother.

The ending -as marks the present tense in Esperanto.

So:

• preparas = prepares / is preparing

Esperanto verb endings are very regular:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command/wish
• -i = infinitive

Examples with the same verb root:

• prepari = to prepare
• preparas = prepares / is preparing
• preparis = prepared
• preparos = will prepare

The -n marks the direct object.

In this sentence, the mother is doing the action of preparing, and the thing being prepared is manĝon (food / a meal). That makes it the direct object.

So:

• La patrino preparas manĝon. = The mother prepares a meal.

Without the -n, the grammar would be wrong here.

This accusative -n is one of the most important features of Esperanto.

Because manĝo is the basic noun form, while manĝon is the direct object form.

• manĝo = meal / food
• manĝon = meal / food as the direct object

In Esperanto:

• nouns end in -o
• direct objects add -n

So:

• La manĝo estas preta. = The meal is ready.
• Mi preparas la manĝon. = I am preparing the meal.

There are two separate things here:

1. -j marks the plural

   • infano = child
   • infanoj = children

2. la means the

   • la infanoj = the children

As for why it is not infanojn: that is because la infanoj is not the direct object of the verb. It comes after por (for), so it is part of a prepositional phrase:

• por la infanoj = for the children

Normally, nouns after a preposition do not take the accusative -n just because they follow a preposition.

So:

• manĝon gets -n because it is the direct object
• la infanoj does not get -n because it is governed by por

Por means for.

So:

• por la infanoj = for the children

It shows who the food is intended for.

Compare:

• Mi faras ĉi tion por vi. = I do this for you.
• Ŝi aĉetas donacon por sia amiko. = She buys a gift for her friend.

In Esperanto, the subject usually has no special ending, and the direct object usually has -n.

In this sentence:

• La patrino = the subject
• preparas = the verb
• manĝon = the direct object
• por la infanoj = a prepositional phrase

So even if the word order changed, the -n would still help you identify the object.

For example, these mean essentially the same thing:

• La patrino preparas manĝon por la infanoj.
• Manĝon preparas la patrino por la infanoj.

The second is less neutral in style, but the grammar is still clear because manĝon has -n.

It can often mean either food or meal, depending on context.

In this sentence, manĝon prepari usually suggests preparing a meal more naturally than just preparing food, though both are possible depending on context.

Esperanto roots are often a little flexible, and the exact English translation can depend on the situation.

Yes. Esperanto word order is fairly flexible because endings carry a lot of grammatical information.

The most neutral order is:

• La patrino preparas manĝon por la infanoj.

But other orders are possible for emphasis, such as:

• Por la infanoj la patrino preparas manĝon.
• Manĝon la patrino preparas por la infanoj.

A learner should usually start with the neutral subject–verb–object order, but it is useful to know that Esperanto allows more freedom than English.

A simple pronunciation guide:

• La ≈ lah
• patrino ≈ pa-TREE-no
• preparas ≈ preh-PAH-rahs
• manĝon ≈ MAHN-jon (with ĝ like the s in measure)
• por ≈ pohr
• la ≈ lah
• infanoj ≈ in-fah-NOY

A few useful pronunciation points:

• Stress is always on the second-to-last syllable
• ĝ sounds like j in judge or the s in measure
• j sounds like English y

So infanoj is stressed on na: in-fa-NOY.

Usually yes, but not always word-for-word in the most natural English.

In Esperanto, la consistently marks definiteness. English also uses the, but sometimes the most natural English translation may sound a little different depending on context.

Still, as a learner, it is best to think:

• la = the

That will usually guide you correctly.

Here is the sentence broken down:

• La = the
• patrino = mother
• preparas = prepares / is preparing
• manĝon = meal / food (direct object)
• por = for
• la = the
• infanoj = children

And structurally:

• La patrino = subject
• preparas = verb
• manĝon = direct object
• por la infanoj = prepositional phrase showing who it is for

This is a very typical Esperanto sentence pattern and a good example of how articles, verb endings, plural endings, and the accusative work together.