What makes a dialect stick around?
This podcast episode ventures to learn a bit about how we learn (or unlearn) dialect, and how that sometimes carries through parents and children.
Brown, Vivian R. Evolution of the Merger of /I/ and /ε/ before Nasals in Tennessee. American Speech, Vol. 66, No. 3 (Autumn, 1991), pp. 303-315
Chambers, J. K. (1992). Dialect acquisition. Language, 68(4), 673-705.
Chambers, J. K. (2002). Dynamics of dialect convergence. Journal of Sociolinguistics, 6(1), 121-123.