Au café, Paul et Marie se taquinent souvent, mais ils rient ensemble.

Au café is a very natural French way to mean at the café or in the café / café setting.

• au = à + le
• café here usually means the place, like a café or coffee shop

French often uses à where English might use at or sometimes in.
So:

• Au café, Paul et Marie... = At the café, Paul and Marie...

Dans le café is also possible, but it sounds more specifically physical, like inside the café building. Au café is the more idiomatic everyday phrasing here.

Se taquinent is a pronominal verb form of se taquiner.

Base verb:

• taquiner = to tease

Pronominal form:

• se taquiner = to tease each other / to tease oneself, depending on context

In this sentence, because the subject is Paul et Marie (two people), se taquinent means they tease each other.

So the se here is not really themselves in the English sense. It is understood as each other because the action goes both ways.

Because the sentence is talking about mutual teasing.

Compare:

• Paul et Marie taquinent Luc.
  = Paul and Marie tease Luc.

• Paul et Marie se taquinent.
  = Paul and Marie tease each other.

Without se, the verb would need a direct object: who are they teasing?
With se, the people doing the action are also the ones receiving it, so it becomes each other in this context.

In French, when a group includes at least one male, the subject pronoun is usually ils.

So:

• Paul et Marie → ils
• Marie et Sophie → elles

This is one of the standard agreement rules in French grammar.

In French, adverbs of frequency like souvent often come after the conjugated verb.

So:

• Paul et Marie se taquinent souvent.

This is the most natural word order.

English often puts often before the main verb:

• Paul and Marie often tease each other

But French usually prefers:

• verb + souvent

You can sometimes move adverbs for emphasis, but the version in the sentence is the normal one.

The comma separates the introductory phrase Au café from the main clause.

It works a bit like:

• At the café, Paul and Marie...

This comma is very natural in writing because Au café sets the scene first.
French punctuation here is similar to English punctuation.

No, the -ent ending is not pronounced in regular present-tense ils/elles verb forms.

So:

• ils rient is pronounced roughly like ree
• the -ent is silent

This is very common in French:

• ils parlent → silent -ent
• elles regardent → silent -ent
• ils taquinent → silent -ent

The ending shows grammar in writing, even when you do not hear it.

Rient comes from rire and is pronounced roughly like ree.

A few pronunciation notes:

• the r is the French r
• ie here gives a sound like ee
• the final -nt is silent

So ils rient sounds very short.
This can be tricky because the spelling looks more complicated than the pronunciation.

Here, ensemble is an adverb, and it means together.

So:

• ils rient ensemble = they laugh together

It does not change form here, and it does not need an article.

Compare:

• Nous mangeons ensemble. = We eat together.
• Elles travaillent ensemble. = They work together.

French, like English, often uses a pronoun once the people have already been named.

So instead of saying:

• Paul et Marie se taquinent souvent, mais Paul et Marie rient ensemble

French naturally says:

• Paul et Marie se taquinent souvent, mais ils rient ensemble.

This avoids repetition and sounds smoother.

Not necessarily. Taquiner can be negative if someone is being annoying or mean, but very often it means playfully teasing someone.

In this sentence, the second part helps a lot:

• mais ils rient ensemble

That suggests the teasing is friendly, light, and mutual, not serious or cruel.

So the overall tone is:

• they tease each other often,
• but they laugh together,
• which shows a good-natured relationship.

The present tense is used here to describe a habitual action or something that is generally true.

• se taquinent souvent = they often tease each other
• ils rient ensemble = they laugh together

This is the French present tense used for regular behavior, just like in English:

• They often tease each other, but they laugh together.

It is not necessarily happening right this second; it can describe what they usually do.