Okay, so from the things I read I think I found a solution.
The speaker seems to have symptoms of an aquired language disorder.
She's saying this:
"Can you enlighten the fact, I don't know which for sim-pasta mosting?
Why don't you go gruel on it?
Same foldgen as ever.
Hover the tablecloth punk.
Do you understand me? Nobody does.
Listen. There's a bodgins at the door. Should I garest him?
Find me a gromph reil." (or this is what I heard)
If she has that language disorder, then I guess this is what she should be saying:
"Can you imagine the fact that I don't know which I'm supposed to be in?
Why don't you go rule me on it.
Same old few things as ever.
You under the table trade off punts.
Do you understand me? Nobody does.
Listen, there is a body at the door.
Should I get rid of him? Find me at grave field"
So, as many of you found out, the letters might form a 'code'
A = 1
B = 2
...
Z = 26
26 * 30 (the number of letters) = 780
I guess if you manage to have the 30 Zs, then you might have a jumpscare of the body and the one that murdered him/her.
This is my guessing, I don't know very well.
Anyways, I think the games have a story behind it. I haven't played them yep, but I'll do as soon as possible