Hi Steven. Language changes over time. We get new words, there are grammatical changes, and accents change over time. If you listen to recordings made by people from your own language community 100 years ago, you will hear for yourself that even over that time accents have changed. Try out some of the links from the Spoken Word Archive Group, for example.

Hello Steven, Do you mean the difference in regional accents and how they originated? * One reason is the patterns of settlement when the area was first discovered and developed. The differences between the cultures that have influenced those regions become obvious in the language. For instance the regional dialect of New Orleans is largely attributable to the many different nationalities that developed the area. French, Irish, African American, Creole, Spanish and other European influences can all be heard within the Crescent City version of American English. In Pennsylvania, the impact of Italian is heard in the regional tendency to elongate words and when locals replace the "th" sound in words with a "t" sound—"three" becoming "tree" or "cathedral" becoming "cateedral"—you're hearing the influence of Polish and other Slavic languages. * A region's geographic location also has a direct influence on the development of a local tongue.In isolated areas for example where there is no contact between regions, entire words, languages and vernaculars can grow and evolve independently. * Social standing and education also affect the vernacular of an individual person—and that extends to a particular area as well.