How do accents change?

References

TitleSut mae acenion yn newid?
Degree of recognitionNational
Media name/outletBBC Radio Cymru
Media typeRadio
Duration/Length/Size13:01
Country/TerritoryUnited Kingdom
Date8/05/23
URLhttps://www.bbc.co.uk/sounds/play/p0fm8czr
PersonsIanto Gruffydd