There is a relatively uniform form of english dialect spoken across this enormous area because of the mobility and migration of Americans allowed for a uniform dialect to spread across the country. Ther reason why there are relatively uniform of englsih dialect across this region (Southeastern, New England and Midlands) because of the migration and mobility of Americans allowed for a uniform dialect to spread across the country.
There were only 23 letters in the Latin alphabet, while the modern English alphabet has 26. Also, there were no lowercase letters in the Latin alphabet.