Language is always changing, evolving, and adapting to the needs of its users

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   Language is always changing, evolving, and adapting to the needs of its users. This isn't a bad thing; if English hadn't changed since, say, 1950, we wouldn't have words to refer to modems, fax machines, or cable TV. As long as the needs of language users continue to change, so will the language.
   

Yes, and so is every other human language. Language is always changing, evolving, and adapting to the needs of its users. This isn't a bad thing; if English hadn't changed since, say, 1950, we wouldn't have words to refer to modems, fax machines, or cable TV. As long as the needs of language users continue to change, so will the language. The change is so slow that from year to year we hardly notice it (except to grumble every so often about the 'poor English' being used by the younger generation!). But reading Shakespeare's writings from the sixteenth century can be difficult. If you go back a couple more centuries, Chaucer's Canterbury Tales are very tough sledding, and if you went back another 500 years to try to read Beowulf, it would be like reading a different language.
Language changes for several reasons. First, it changes because the needs of its speakers change. New technologies, new products, and new experiences require new words to refer to them clearly and efficiently. Consider texting: Originally it was called text messaging, because it allowed one person to send another text rather than voice messages by phone. As that became more common, people began using the shorter form text to refer to both the message and the process (as in I just got a text or I'll text Sylvia right now).
Another reason for change is that no two people have had exactly the same language experience. We all know a slightly different set of words and constructions, depending on our age, job, education level, region of the country, and so on. We pick up new words and phrases from all the different people we talk with, and these combine to make something new and unlike any other person's particular way of speaking. At the same time, various groups in society use language as a way of marking their group identity - showing who is and isn't a member of the group. Many of the changes that occur in language begin with teens and young adults: As young people interact with others their own age, their language grows to include words, phrases, and constructions that are different from those of the older generation. Some have a short life span (heard groovy lately?), but others stick around to affect the language as a whole.
All living languages are continually undergoing change. Some commentators use derogatory labels such as "corruption" to suggest that language change constitutes a degradation in the quality of a language, especially when the change originates from human error or is a prescriptively discouraged usage. Modern linguistics rejects this concept, since from a scientific point of view such innovations cannot be judged in terms of good or bad.John Lyons notes that "any standard of evaluation applied to language-change must be based upon a recognition of the various functions a language 'is called upon' to fulfil in the society which uses it".

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