I lived in the Potteries for 4 years- and worked in an engineering firm with 'real' Potters- and they loved to teach me. A loouk in the booouk - and 'go'way you silly booogar', etc. Very easy to pick up, lol.
Love accents too- learning Italian and Sicilian is so different.
We had visitors from California recently, with a couple from Brittany who spoke very good English- and we watched Len Loache's 'Angels' Share' in working class Glaswegian- they didn't understand ONE word, lol.
OH grew up in Sussex and Surrey- and has a very flat non-descript accent- and studied at UCH London- he really really struggled when working in the Potteries, and had to keep asking people to repeat! I got it straight away and had to translate for him- hilarious.