What do you call that distinct sound that swedish people make and how to achieve it? Please watch this video at 3:01 (when the woman says the word förbi) https://www.youtube.com/watch?v=avoKDIEyJ6M
when the woman says "förbi" at 3:01 it has a curl or whatever at the end of the word (i'm not pertaining to the snapping sound )
Oh, the iii sound? I don't think that has a name. Lundgren8 might know.
Long vowels in Swedish are often slightly dipthongised, that is they finish on a short second element, sometimes when stressed it might be a short off-bounce on a schwa-sound, so that long [eː] is more like [eːᵊ] and [iː] is [iːʲ] but can even be [iːʲᵊ] in my experience, almost disyllabic.
This is more common in certain accents as noted below but I think it occurs everywhere to some extent. Blehg talks a bit about it here: https://www.youtube.com/watch?v=hzYArZVTD4s
It's a sort of 'y' noise that you make with your tounge bunched up at the back of your mouth. That's the best way I can describe it! I hear it a lot living in Växjö in the south of Sweden, more-so than I heard it in Skåne though.
Doesn't really sound like it, though. She's using a diphthong in addition to the vowel, which I think it what OP asked about ("it has a curl or whatever at the end of the word"). The vowel in itself, absolutely.
Okey. Maybe it is a schwa sound from Gnällbältet? https://sv.wikipedia.org/wiki/Gn%C3%A4llb%C3%A4ltet