Vull comprar formatge i ous perquè demà cuinem a casa.

In Catalan, subject pronouns are often left out because the verb ending already shows who is doing the action.

• vull = I want
• The ending tells you it is first person singular

So Vull comprar... naturally means I want to buy...

You can say Jo vull comprar..., but that usually adds emphasis, like:

• Jo vull comprar formatge = I want to buy cheese

Most of the time, just vull is enough.

After voler (to want), Catalan usually uses another verb in the infinitive, just like English:

• Vull comprar = I want to buy
• Vull menjar = I want to eat
• Vull anar = I want to go

So vull + infinitive is a very common pattern.

Because Catalan often leaves out the article when talking about some amount of something rather than a specific item.

So:

• comprar formatge = to buy cheese
• comprar ous = to buy eggs

This is similar to English, where we also say:

• I want to buy cheese and eggs not usually
• I want to buy the cheese and the eggs unless we mean specific ones already known

If you wanted to be more specific, you could use articles:

• el formatge = the cheese
• els ous = the eggs

Ou means egg, and its plural is ous.

This can look a little unusual to English speakers, but it is the normal Catalan plural:

• un ou = an egg
• dos ous = two eggs

A useful extra detail:

• singular definite: l'ou
• plural definite: els ous

So in the sentence, ous simply means eggs.

Here perquè means because.

• Vull comprar formatge i ous perquè demà cuinem a casa. = I want to buy cheese and eggs because tomorrow we’re cooking at home.

The accent matters because perquè is different from per què.

• perquè = because
• per què = why / for what

Examples:

• No vinc perquè estic cansat. = I’m not coming because I’m tired.
• Per què no vens? = Why aren’t you coming?

So in your sentence, it is one word with an accent because it introduces the reason.

Catalan often uses the present tense to talk about a future planned action, especially when there is a time word like demà (tomorrow).

So:

• demà cuinem a casa literally = tomorrow we cook at home
• but in natural English it often means tomorrow we’re cooking at home or tomorrow we will cook at home

This is very common in Catalan.

You could compare:

• Demà vaig al mercat. = Tomorrow I’m going to the market.
• Demà sopem fora. = Tomorrow we’re eating out.

So cuinem is present in form, but future in meaning because of demà.

Here it is understood as present indicative: we cook / we are cooking.

Formally, cuinem can look the same as the present subjunctive, but in this sentence the meaning is clearly indicative because:

• perquè here means because
• it gives a real reason
• demà sets a real planned action

So the sentence means:

• because tomorrow we’re cooking at home

Not a subjunctive idea like doubt, wish, or purpose.

A casa means at home or to home / at someone’s home, depending on context.

In this sentence:

• cuinem a casa = we cook at home

This is a very common Catalan expression.

Examples:

• Sóc a casa. = I’m at home.
• Vaig a casa. = I’m going home.
• Mengem a casa. = We eat at home.

So here it simply means the cooking will happen at home.

Demà is a time expression, and Catalan often puts time words near the beginning of the clause.

So:

• perquè demà cuinem a casa

feels very natural and emphasizes when the cooking happens.

Catalan word order is somewhat flexible, so you may also see variations like:

• perquè cuinem a casa demà

But perquè demà cuinem a casa sounds more natural in most neutral contexts.

Formatge is roughly pronounced like fohr-MAHT-juh.

A few helpful points:

• for- sounds like for but usually shorter
• the tg in -atge gives a sound like the j in jam
• the final e is a weak vowel, like uh

So formatge sounds approximately like:

• fohr-MAHT-juh

Exact pronunciation varies a bit by dialect, but that approximation is useful for learners.

Normally i means and and is pronounced like ee.

So:

• formatge i ous = cheese and eggs

When speaking naturally, the i can sound quite smooth and link closely to the next word, but it is still just the normal conjunction and.

Unlike Spanish, Catalan does not normally change i before words beginning with an i sound. So it stays i.