Paul est de nouveau en retard.

Because French expresses to be late with the verb être plus the fixed expression en retard.

• être en retard = to be late
• literally, to be in lateness/delay, but you should learn it as one whole expression

So:

• Paul est en retard = Paul is late

French does not say avoir retard for this meaning.

De nouveau means again or once again.

So the sentence means that Paul is late another time, not for the first time.

It is different from nouveau by itself:

• nouveau = new
• de nouveau = again

Even though nouveau is inside the expression, de nouveau is a set phrase and should be learned as a unit.

Because in French, adverbial expressions like de nouveau often come after the conjugated verb.

Here the structure is:

• Paul = subject
• est = verb
• de nouveau = adverbial phrase
• en retard = complement/predicate expression

So:

• Paul est de nouveau en retard

This word order is very natural in French.

You could also move de nouveau for emphasis in some contexts, for example:

• De nouveau, Paul est en retard.

But the original version is the most neutral everyday phrasing.

En retard is a very common French expression meaning:

• late
• behind schedule
• delayed

Examples:

• Je suis en retard. = I’m late.
• Le train est en retard. = The train is late.

It is best to treat en retard as one chunk rather than translating en and retard separately every time.

Because en retard is a fixed idiomatic expression. French simply says:

• être en retard

not:

• être en le retard
• être en un retard

Many French expressions with en work like this and do not use an article.

So just memorize:

• en retard = late

Yes. Paul est encore en retard is very common and often sounds more natural in everyday speech.

However, encore can sometimes mean either:

• again
• still

So depending on context, encore may be slightly ambiguous.

By contrast, de nouveau clearly means again / once again.

So:

• Paul est de nouveau en retard = clearly Paul is late again
• Paul est encore en retard = usually Paul is late again, but context matters

In many cases, yes. Both can mean again.

So these are very close:

• Paul est de nouveau en retard.
• Paul est à nouveau en retard.

In everyday usage, both are acceptable. Sometimes style guides or speakers feel tiny differences in nuance, but for most learners, they can usually be treated as equivalents here.

Also, in everyday spoken French, encore is often even more common.

No. In French, retard is a normal noun meaning delay or lateness.

For example:

• un retard = a delay
• avoir du retard = to be running late / to be behind

So in this sentence, retard is just standard everyday French with no unusual tone.

A simple pronunciation guide is:

pohl eh duh noo-voh ahn ruh-tahr

A more accurate IPA version is:

/pɔl ɛ də nu.vo ɑ̃ ʁə.taʁ/

A few useful points:

• Paul: the l is pronounced
• est: here it sounds like eh
• de: often a light duh
• nouveau: the final -eau sounds like oh
• en: nasal vowel, not a full en
• retard: the final d is silent

Yes, it can.

By itself, de nouveau only means again, but in context, repeating a problem often suggests irritation or criticism.

So depending on tone of voice or the situation, the sentence could feel like:

• neutral: Paul is late again.
• annoyed: Paul is late again.

The grammar itself is neutral, but the situation often adds that emotional coloring.