Belgian nationality process after submission

Hi all,
I've been living in Belgium, Kortrijk for 5 yrs now, have worked ever since, and i passed an appropriate language exam too. Thus i'm eligible for the citizenship, I'll submit my "dossier" soon at the Commune.
Does anyone have an experience with the procedure afterwards? I was told they'll launch an investigation and check me. How does that work? Do they come to your place? Is it like an interview? In what language? What if you're not @home, do they call you?

Thx a lot for your help
Margo