Additional context:
Native speakers of my mother tongue do not all understand each other due to some pretty extreme dialects. Now that I’m in Europe, I’ve noticed multiple instances of people sometimes not understand the dialect of someone from a village 10-20 km away…
In contrast, for example most American, British, and Australian people can just… understand each other like that?? I never thought much about it before but it’s pretty incredible
Edit: thanks everyone, and clearly I didn’t think of certain parts of the UK when I was in the shower and thought of this…
Scots is common throughout the country. There’s also a local variant in the north east called Doric which to others is near impossible to understand. It’s perhaps more rural only, although there’s certainly still people in Aberdeen that speak it.
Do you know where in Scotland this person was from? That might help narrow it down.
Was there a lot of Fs? In Doric the “wh” from English questions is changed to an F.
What? - Fit?
Where? - Far?
When? - Fan?
How? - Foo?
Why? - often how is asked to mean why, or just fit why will be asked
If you are in a Doric shoe shop you can legitimately ask “Fit fit fits fit fit?” which means “Which foot fits which foot?”