Les conditions de retour indiquent le délai de rétractation.

Because the subject is Les conditions de retour, and the main noun there is conditions, which is plural.

• les conditions = the conditions
• indiquent = indicate

So the verb has to agree with conditions, not with retour or délai.

Compare:

• La condition indique... = The condition indicates...
• Les conditions indiquent... = The conditions indicate...

Literally, it means the conditions of return.

In more natural English, this often corresponds to:

• return conditions
• return policy
• terms for returns

Here, de retour tells you what kind of conditions they are: conditions related to returning an item.

French often uses de + noun to describe the type or function of something.

So:

• conditions de retour = return conditions
• politique de remboursement = refund policy
• formulaire de contact = contact form

Using du retour would usually sound more like of the return, referring to one specific return, not the general idea of returns. In this sentence, French is describing a category, so de retour is the natural choice.

Grammatically, it breaks down like this:

• le délai = the period, time limit, deadline
• de rétractation = of withdrawal / cancellation

So le délai de rétractation is the legal or official period during which someone can change their mind and cancel or withdraw.

In consumer law, this is often translated as:

• withdrawal period
• cooling-off period
• sometimes cancellation period, depending on context

Because in French, when one noun is used to define another, de often appears without an article.

So:

• un délai de rétractation
• une carte de crédit
• une salle de bain

This structure is very common. It works a bit like an English noun modifier.

Here, rétractation is not being presented as a specific separate thing with la; it is part of the fixed expression that describes what kind of délai it is.

They are related, but not identical.

• retour = return, sending an item back
• rétractation = withdrawal, backing out of a purchase or agreement

So:

• conditions de retour are the rules for returns
• délai de rétractation is the time limit during which the customer has the legal right to withdraw

In practice, these ideas often overlap in shopping contexts, but rétractation is more formal and legal than retour.

Because it refers to one specific time limit: the withdrawal period.

French often uses the singular when talking about one general rule or one defined legal period.

So les conditions are plural because there may be several rules, but le délai is singular because there is one relevant deadline being indicated.

No, the word order is quite standard:

• Les conditions de retour = subject
• indiquent = verb
• le délai de rétractation = direct object

So the structure is simply:

Subject + Verb + Object

That makes this a good example of basic French sentence order.

A careful pronunciation would be roughly:

Lay kon-dee-syon duh ruh-tour an-deek luh day-lay duh ray-trak-ta-syon

A few useful notes:

• Les sounds like lay
• conditions ends with a nasal sound in -tions
• retour has a French r
• indiquent is pronounced like indique in speech; the -ent ending is silent
• délai sounds like day-lay
• rétractation has a clear ray-trak-ta-syon

Yes. Indiquer is a flexible verb, and the best translation depends on context.

Here, possible English translations include:

• indicate
• state
• specify
• show

In a formal or commercial context, state or specify may sound more natural than indicate.

So even though the basic meaning is the same, the most idiomatic English wording can vary.