Hi Gunnar, I thought I would continue this conversation here.
Gunnar Some Scottish accents are just as difficult to understand as some Irish accents. I am sure the same is true in parts of the US.
Here are few samples of Scottish regional accents. I could have included many many more but since most of the video’s I researched were extremely funny and entertaining they also included profanities and therefore decided it inappropriate to post links here.
Doric - Aberdeenshire
Scottish Borders Accent