I thought I heard some faint Norwegian dialogue behind the constant noise of the screaming main character in the Scream painting, so I had to try to understand what they were saying. In order to hear them clearly, I had to disable music and ambient sound, so to save you the trouble:

Here is a full transcript of the conversation, in Norwegian, and my best attempt at an English translation that keeps the "improv vibe" of the original. This sequence was quite funny in Norwegian as the conversation is very forced and a few of the words are deliberately old-timey,

Video with audio and subtitles: on reddit

Full dialogue loop:

Transcript of the original Norwegian dialogue:

To add a bit more context, I noticed that the sound design team (Nok Nok Audio) is based in Oslo, so this is probably just them having a bit of fun :)