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?”