Both Mr. Zimmer and Professor Hall suggested that fears of the mass media's erasing regional accents and language are overblown. People don't interact with television, Professor Hall said; they speak like their parents and the people they associate with. And the years of research, continuing into the present, show that regional terms have a stubborn staying power. There are, of course, changes. What was once the upper-class, non-rhotic East Coast accent, most notably identified with Franklin Roosevelt, is fading, and there are indications of a notable vowel shift around the country, all of which will be lovingly documented.