http://www.bl.uk/learning/langlit/sounds/changing-voices/

go check this link out, its good to look at another view of language change with some good points and developed terms.

language changes because it is learned. it is learned by many generations and with this, language changes depending on the people, spreading them to different regions and different cultures. Mostly, its down to adaptation of the words used and for their needs. The main influential factor of language change is the internet. The world has become a lot smaller due to the internet, we can talk to people on the other side of the world through email or MSN, all them technologies feeded by the internet makes things a lot easier to communicate with others, which then helps people to change their language and converge with others. this is against Prescriptivists as they feel that the standard english is being killed, and more non-standard is being