No, It's down to intelligent listening,guesswork and a good ear.but I doubt that you would understand "most Scots dialect" as most Scots dont! Henderson,like Burns before him, borrowed dialect words from other regions of Scotland if they fitted better, or enhanced the picture.On occasions, Burns even modified words to suit a line. In one of my own dialect songs,"Lallans Love" (Wildgoose Records WGS346 CD "Ingleneuk") the first line is, "When cranreuch cauld,has gar'd the gimmers coorie doon ahint the wa'" Now cranreuch, (hoar frost,Scots gael.) is not an Ayrshire word,but it does fit the line I think. The Auld,Scotch,dialect has died out in most areas,but a few try to keep it alive. I recall my brother being informed at our village school in the 50's that his "bits (shoes) were a' glaur" (mud) I don't think that many Culton weans, would understand that now.