Au travail, nous nous aidons les uns les autres.

It means at work or in the workplace.

• à + le becomes au
• So au travail literally comes from à le travail
• In this sentence, it sets the scene: At work, ...

It does not usually mean to work here. It is a location/context expression.

The two nous do different jobs.

• The first nous is the subject: we
• The second nous is a pronoun linked to the verb: ourselves / each other

So:

• nous aidons = we help
• nous nous aidons = we help ourselves / we help each other

In this sentence, the meaning is reciprocal, not reflexive: the people are helping one another.

Not normally. The basic verb is just aider = to help.

Examples:

• J’aide Marie. = I help Marie.
• Nous aidons nos collègues. = We help our colleagues.

But French can use aider with a pronoun:

• Je m’aide = I help myself
• Nous nous aidons = we help each other / we help ourselves, depending on context

So aider is not inherently reflexive, but it can be used pronominally.

Because the subject is nous, and in the present tense aider is conjugated:

• j’aide
• tu aides
• il/elle aide
• nous aidons
• vous aidez
• ils/elles aident

So nous aidons is the correct we form.

As for aidons-nous, that word order would usually be used for:

• a question in formal style: Aidons-nous les uns les autres ?
• or a command: Aidons-nous !

In your sentence, it is a normal statement, so French uses nous nous aidons.

It means each other or one another.

It is a common French reciprocal expression used when several people do something mutually.

So:

• Nous nous aidons les uns les autres = We help each other

This phrase makes the reciprocal meaning very explicit.

Because it adds clarity and emphasis.

• Nous nous aidons can already mean we help each other
• But les uns les autres removes any doubt and strongly highlights the idea of mutual action

So the full sentence sounds very natural if you want to stress teamwork or cooperation.

English does something similar with:

• We help each other instead of just
• We help ourselves or some less clear structure

Because les uns les autres is the plural form.

• l’un l’autre = one another / each other for two people, or in a singular-style expression
• les uns les autres = the plural version, used for a group

Since nous refers to more than one person, les uns les autres fits naturally here.

Yes, it can.

If the group is all feminine, you can say:

• les unes les autres

If the group is mixed or masculine, French normally uses:

• les uns les autres

So in a general sentence like this, les uns les autres is the standard form unless you specifically know the whole group is female.

That would mean something different.

• nous aidons les autres = we help others
• nous nous aidons les uns les autres = we help each other

The first one does not necessarily mean the members of the group help one another. It could mean we help other people.

So the pronoun nous before the verb is important.

Yes. A natural alternative is:

• Au travail, nous nous aidons mutuellement.

That also means At work, we help each other.

Difference in feel:

• les uns les autres sounds very concrete and personal
• mutuellement sounds a bit more abstract or formal

Both are correct.

Because Au travail is placed at the beginning as a context phrase.

French often uses a comma after an introductory element like:

• Au travail, ...
• Le matin, ...
• En France, ...

The comma is not absolutely the most important part of the grammar, but it helps readability and shows that Au travail sets the scene for the rest of the sentence.