Només tinc una moneda de dos euros, així que necessito canvi.

Només means only or just.

In this sentence, Només tinc una moneda de dos euros means I only have a two-euro coin.

Putting només near the beginning emphasizes the limitation right away. Catalan often places words like només before the part they affect, and here it affects the whole idea of having just one coin.

You could think of it as:

• Només tinc... = I only have...

Tinc is the first person singular present tense form of the verb tenir, which means to have.

So:

• tenir = to have
• tinc = I have

Some useful present-tense forms are:

• tinc = I have
• tens = you have
• té = he/she/it has
• tenim = we have
• teniu = you all have
• tenen = they have

So Només tinc... literally means I only have...

Una moneda de dos euros literally means a coin of two euros, which is how Catalan naturally expresses a two-euro coin.

Breakdown:

• una moneda = a coin
• de dos euros = of two euros / worth two euros

Catalan commonly uses de to describe the value of coins, notes, containers, quantities, and similar things.

So:

• una moneda de dos euros = a two-euro coin
• un bitllet de deu euros = a ten-euro note

This is normal and idiomatic Catalan.

Because there is one coin, but that coin has a value of two euros.

So:

• una moneda = one coin → singular
• dos euros = two euros → plural

This is exactly the same logic as in English:

• a two-euro coin

There is one coin, but its value is two euros.

Així que means so, therefore, or thus.

In this sentence:

• Només tinc una moneda de dos euros, així que necessito canvi.
• I only have a two-euro coin, so I need change.

It is a very common connector used to show a consequence or result.

Other examples:

• Estic cansat, així que me'n vaig a dormir. = I'm tired, so I'm going to sleep.
• Plou, així que ens quedem a casa. = It's raining, so we're staying home.

Here, canvi means change in the money sense, and it is being used as an uncountable noun, like in English.

So:

• necessito canvi = I need change

There is no article because the speaker means some change, not a specific, already-known set of coins.

If you said necessito el canvi, it would sound more like:

• I need the change meaning a specific change that has already been mentioned or is expected.

So in this sentence, necessito canvi is the natural choice.

No. Canvi can mean change in more than one sense.

Common meanings include:

• change as in coins/small money
• change as in alteration or modification

Examples:

• Necessito canvi. = I need change.
• Hi ha hagut un canvi de plans. = There has been a change of plans.

So the exact meaning depends on context. In your sentence, because it mentions a coin, canvi clearly means money change.

Catalan often leaves out a word equivalent to some when English would naturally include it.

So:

• necessito canvi literally = I need change but the sense is often I need some change

This is very normal in Catalan. The noun by itself can already carry that general, indefinite meaning.

Compare:

• Necessito ajuda. = I need help.
• Necessito aigua. = I need water.
• Necessito canvi. = I need change.

The accent in només shows where the stress falls: no-MÉS.

So the last syllable is stressed.

The word is pronounced roughly like:

• no-MESS

The accent mark is important because Catalan uses written accents to show stress and sometimes vowel quality.

So només should not be read with equal stress on both syllables. The natural stress is on -més.

The accent in així shows that the stress falls on the last syllable:

• ai-XÍ

Roughly, it sounds something like:

• eye-SHEE

So:

• així = like this / thus / so
• així que = so / therefore

Again, the accent helps you stress the word correctly.

Yes. In many contexts, només can be translated as either only or just.

So:

• Només tinc una moneda de dos euros. can be understood as:
• I only have a two-euro coin or
• I just have a two-euro coin

In this sentence, only is usually the clearest translation, because the idea is about limitation.

Yes, but that would mean something different:

• Només tinc una moneda de dos euros = I only have one two-euro coin
• Només tinc dues monedes d’un euro = I only have two one-euro coins

Catalan is very precise here:

• una moneda de dos euros = one coin worth two euros
• dues monedes d’un euro = two coins worth one euro each

So the structure stays the same, but the meaning changes depending on the number and value.

It is very natural and usually recommended here, because així que introduces the result of the first clause.

So the sentence is neatly divided into:

• Només tinc una moneda de dos euros
• així que necessito canvi

The comma helps show that relationship:

• situation → result

In informal writing, punctuation can vary a little, but with a connector like així que, the comma is standard and helpful.