I worked in Boeblingen, Germany for four months in 1980 where the locals spoke Schwabisch, a vastly different sound from the Hoch Deutsch I heard my Mother and Grandmother (from Hamburg) speak. The two differences I remember were 'Zwo' instead of 'Zwei' and 'Ee' instead of 'Ich'. The word sounds were also smooshed together, compared to Hoch Deutsch, which was spoken with better diction.

It made learning German a bit more of a challenge .. but it was entertaining.