La verdura que volem avui és al supermercat de la plaça.

In Catalan, la verdura is often a collective noun. It can mean vegetables in a general sense, even though it is grammatically singular.

So:

• la verdura = vegetables / the vegetables / produce, depending on context

If you want to talk about different vegetable types as separate items, you may also see les verdures, but la verdura is very common for food in general.

Here que is a relative pronoun, meaning that or which.

It connects la verdura with the extra information:

• la verdura = the vegetable(s)
• que volem avui = that we want today

So que introduces the clause describing la verdura.

Volem is the 1st person plural present tense of voler, which means to want.

So:

• vull = I want
• vols = you want
• vol = he/she/it wants
• volem = we want
• voleu = you all / you formal plural want
• volen = they want

In this sentence, volem tells you the subject is we.

Catalan often leaves out subject pronouns when they are not needed, because the verb ending already shows who the subject is.

So:

• volem already means we want

You could say nosaltres volem, but that usually adds emphasis, contrast, or clarity.

So the sentence sounds natural without nosaltres.

Avui means today, and Catalan is fairly flexible about where adverbs go.

In this sentence:

• que volem avui = that we want today

This is a very natural word order. But other orders are also possible, depending on emphasis:

• la verdura que avui volem
• avui, la verdura que volem...

The original version is neutral and idiomatic.

Al is a contraction of:

• a + el = al

So:

• al supermercat = at the supermarket / to the supermarket, depending on context

Here it means at the supermarket.

Also, supermercat is masculine singular, so it takes el:

• el supermercat
• a el supermercat → al supermercat

This is a very common question because Catalan ser and estar do not match English to be perfectly.

In this sentence, és al supermercat gives a straightforward location: it is at the supermarket.

A few useful points:

• ser can be used to indicate location in Catalan, especially in more neutral or traditional usage
• estar is also common in many varieties of modern spoken Catalan, especially when emphasizing being/staying somewhere

So in everyday Catalan, many speakers might also say:

• La verdura que volem avui està al supermercat de la plaça.

But és al supermercat is perfectly normal Catalan.

Literally, de la plaça means of the square, but in natural English it usually means something like:

• the supermarket on the square
• the supermarket by the town square
• the supermarket in the square area

Here de helps identify which supermarket we mean. It does not usually mean ownership.

So el supermercat de la plaça is the supermarket associated with or located by the square.

La is the feminine singular definite article, meaning the.

So:

• la verdura = the vegetables / the produce
• la plaça = the square

Both verdura and plaça are feminine singular nouns, so they take la.

The ç in Catalan is pronounced like s.

So plaça sounds roughly like:

• PLAH-suh in a simple English-style approximation

More exactly, the final vowel may sound weaker depending on the dialect.

A useful spelling tip:

• ç is used before a, o, u to keep the s sound
• without it, c before a, o, u would normally sound like k

So plaça has an s sound, not a k sound.