Vull saber la raó.

Vull means I want. It is the first-person singular form of the verb voler = to want.

A few present-tense forms of voler are:

• jo vull = I want
• tu vols = you want
• ell/ella vol = he/she wants
• nosaltres volem = we want
• vosaltres voleu = you all want
• ells/elles volen = they want

So Vull saber la raó literally starts with I want...

Catalan often omits the subject pronoun when it is already clear from the verb form.

• Vull already tells you the subject is jo = I
• So Jo vull saber la raó is possible, but Vull saber la raó is more natural in many contexts

This is similar to Spanish and unlike normal English, where you usually must say I want.

Saber means to know in the sense of to know a fact, to find out, or to be informed about something.

In this sentence, vull saber means:

• I want to know
• I want to find out

So Vull saber la raó is literally I want to know the reason.

Catalan has more than one way to express to know, and learners often wonder about this.

• saber = to know a fact, piece of information, answer, explanation
• conèixer = to know someone/somewhere, or to be familiar with something

Here, la raó is information, so saber is the correct choice.

Examples:

• Sé la resposta. = I know the answer.
• Conec aquesta ciutat. = I know this city.

So Vull saber la raó is natural, while Vull conèixer la raó would usually not be the normal choice.

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

• la raó = the reason

In this sentence, the speaker means a specific reason, so la is natural.

Compare:

• Vull saber la raó. = I want to know the reason.
• Vull saber una raó. = I want to know a reason.
  This sounds different and less likely in many contexts.

So the article is not unusual here; it is the normal way to refer to the reason.

Yes. In Catalan, saber can take a direct object when the meaning is to know some information.

So these are normal:

• Sé la veritat. = I know the truth.
• No sé la resposta. = I don’t know the answer.
• Vull saber la raó. = I want to know the reason.

Catalan also very often uses a clause:

• Vull saber per què. = I want to know why.
• Vull saber quina és la raó. = I want to know what the reason is.

All of these are natural, but Vull saber la raó is perfectly grammatical.

Both can often translate as reason, but they are not always used in exactly the same way.

• raó often means reason, cause, or even being right in other contexts
• motiu often means motive, reason, or grounds

In many situations, both work:

• Vull saber la raó.
• Vull saber el motiu.

But raó is a very common everyday word, and learners should also know that it appears in expressions like:

• Tens raó. = You are right.
• No tens raó. = You are not right.

So raó has a broader range than just reason.

A simple learner-friendly pronunciation guide is:

• Vull ≈ bool or vool depending on accent
• saber ≈ suh-BE or sah-BEHR
• la = lah
• raó ≈ rah-O

A more approximate overall pronunciation:

• bool suh-BE lah rah-O

A few notes:

• The ll in vull is not pronounced like English ll in most accents
• The stress in raó falls on the last syllable: ra-Ó
• Catalan pronunciation varies by region, so exact sound details can differ

The accent mark in raó shows that the stress falls on the final syllable:

• ra-Ó

Without going too deeply into spelling rules, the accent helps mark the correct stress and vowel quality.

This matters because stress is important in Catalan pronunciation. So the written accent is not optional; it is part of the correct spelling:

• raó = correct
• rao = incorrect

The normal word order here is:

• Vull = I want
• saber = to know
• la raó = the reason

So:

• Vull saber la raó.

This is the most neutral and natural order.

Catalan can sometimes change word order for emphasis, but for a basic sentence like this, learners should stick with the standard order. For example, La raó, la vull saber could exist in a special emphatic context, but it is not the default pattern you should learn first.

Yes. Voldria saber la raó means I would like to know the reason and sounds more polite or less direct than Vull saber la raó.

Compare:

• Vull saber la raó. = I want to know the reason.
  More direct.
• Voldria saber la raó. = I would like to know the reason.
  More polite or softer.

So if you are speaking to someone formally or want to sound less blunt, voldria is often a good choice.