La meva mare diu que l'equip acabarà el projecte avui, encara que l'informe sigui gran.

In Catalan, possessives are usually used together with a definite article, so la meva mare is the normal way to say my mother.

A few examples:

• el meu pare = my father
• la meva germana = my sister
• els meus amics = my friends

This is different from English, where you normally say just my mother without the.

The apostrophe shows that the article has been shortened before a vowel.

• el equip becomes l'equip
• el informe becomes l'informe

This happens because Catalan avoids the awkward vowel sequence. It is the same idea as:

• l'home = the man
• l'aigua = the water

So l' here is just the definite article el shortened before a vowel.

Diu is the 3rd person singular present tense of dir = to say.

So:

• jo dic = I say
• tu dius = you say
• ell/ella diu = he/she says

In the sentence, La meva mare diu... means My mother says...

Here que means that and introduces a subordinate clause:

• La meva mare diu que... = My mother says that...

In English, that is often optional:

• My mother says the team will finish...
• My mother says that the team will finish...

In Catalan, que is normally kept. So you generally do not drop it in this kind of sentence.

Acabarà is the future tense of acabar = to finish.

It is the 3rd person singular future:

• acabaré = I will finish
• acabaràs = you will finish
• acabarà = he/she/it will finish

Since l'equip is singular, Catalan uses acabarà:

• l'equip acabarà = the team will finish

Because l'equip is grammatically singular in Catalan, just like the team is singular in many contexts in English.

So Catalan uses:

• l'equip acabarà = the team will finish

Not:

• l'equip acabaran

Even though the team contains many people, the noun itself is singular, so the verb agrees with the singular noun.

Encara que means although, even though, or sometimes even if, depending on context.

In this sentence, it introduces a contrast or concession:

• encara que l'informe sigui gran = although/even if the report is big

It tells you that the main action is still expected to happen despite that fact.

Because after encara que, Catalan often uses the subjunctive when the speaker presents the idea as uncertain, hypothetical, or simply as a concession rather than a straightforward fact.

So:

• encara que l'informe sigui gran = although/even if the report is big

Here sigui is the present subjunctive of ser.

Compare:

• és = is (indicative)
• sigui = be / is, in a subjunctive context

This is one of the most important grammar points in the sentence.

Sigui is the 3rd person singular present subjunctive of ser.

A few forms of the present subjunctive of ser:

• jo sigui
• tu siguis
• ell/ella sigui
• nosaltres siguem
• vosaltres sigueu
• ells/elles siguin

In the sentence, l'informe is singular, so Catalan uses sigui.

Catalan uses ser for more inherent or defining characteristics, and gran is treated as a quality of the report.

So:

• l'informe sigui gran = the report is big/large

Using estar here would not be natural. Ser is the normal choice for size or general characteristics.

Not always. Gran can mean big, large, great, or sometimes long/major, depending on context.

With informe, it could suggest:

• physically long
• substantial
• extensive
• large in scope

So l'informe sigui gran does not have to mean only physically large; it can also mean the report is substantial or lengthy.

Catalan word order is fairly flexible, but acabarà el projecte avui is a normal and natural order.

It means:

• will finish the project today

You could also move avui for emphasis:

• avui l'equip acabarà el projecte
• l'equip avui acabarà el projecte

But the original version is a neutral, standard order.

It can be close to either one, depending on how the speaker sees the situation.

• although if the speaker is treating it as a real circumstance
• even if if the speaker is emphasizing concession regardless of whether it is fully established

Because the clause uses the subjunctive (sigui), it has a slight sense of concession/hypothesis. So English could naturally render it as either:

• although the report is big
• even if the report is big

Both can fit, depending on context.

Yes, sometimes, but the meaning changes slightly.

Very roughly:

• encara que + subjunctive: the speaker presents the idea as not fully asserted, hypothetical, or simply concessive
• encara que + indicative: the speaker treats it more as an accepted fact

So:

• encara que l'informe sigui gran = although/even if the report is big
• encara que l'informe és gran would sound much less natural in this sentence and is generally not the expected choice here

For learners, the safest approach is: after encara que, very often expect the subjunctive, especially in sentences like this one.