Siri is not only miffed by Scottish English, it also doesn't follow English spoken with a Japanese accent.
"Work" and "walk" are notoriously difficult for Japanese speakers—largely because the Japanese loan word for "work" is "waaku" (ワーク). Japanese people are used to saying "waaku" for "work".
The gentlemen who recorded this video has a good accent and more patience than I.
Siri vs Japanese, Walk? Work? F**ck?" [Watashi to Tokyo]