I was watching Frankie Boyle on Scotland last night and was fascinated by a sequence where there was a class on Scots in a prison. https://www.bbc.co.uk/iplayer/episode/m000f9cr/frankie-boyles-tour-of-scotland-series-1-2-edinburgh-to-aberdeen (from about 14:30).
It was interesting to see how engaged the participants were in a variety/language/dialect (I make no judgement about its status) that reflected their lives. These was an interested sequence where they write a report in Scots and it seems likely that they are more motivated by the subversion involved.
Another apsect that was interesting was the discussion of how much the dialect/language varied in terms of lexis according to different parts of the country. There are clear links then to identities within the country.
I was also intrigued to see the apparent differences between this prison and those I had visited. It seems more "high tech" and the rooms for teaching seem smarter but perhaps much of this is down to the editing.