It seems that in Creole, Nou can be a respectfulway to adress someone instead of ou, are there rules on how how and when to use it?

Yes, it does seem like it, especially when you're addressing someone older than you.

But "Nou" translates "we" and "you (plural)".

You will especially use "nou" when addressing a crowd of people too.

\Example:

1. God bless you all.
Bondye beni nou.

2. I love you (to a crowd).
Mwen renmen nou.

3. Hello to you all.

Bonjou a nou tout.

4. We will never forget.
Nou pap janm bliye.

5. We are one.
Nou se youn.

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