Here are some examples of terminology that will be useful for language change:
Amelioration: A process by which the meaning of a word changes to something more favourable.
Pejoration: Sematic change whereby a word acquires unfavourable connotations.
Broadening: The process by which the meaning of a word becomes broader or more inclusive than its earlier meaning (also known as generalization or extension)
Narrowing: The process by which a word's meaning becomes less general or inclusive than its earlier meaning. This kind of semantic change is also known as specialization.
Back-formation: The process of forming a new word by extracting actual or supposed affixes from another word- shortened words created from longer words.
Article for language change:
Here is an article which I found interesting about language change.
http://www.theguardian.com/science/2015/may/01/icymi-english-language-is-changing-faster-than-ever-says-expert
This article explains how fast the English language is changing due to development in social media which is causing language to spread and change.
Over the past couple decades language has changed a lot, first came about the changes between people texting one another- text language and now is the language of social media which involves typing how we speak compared to language a few years ago which was different when written and spoken.
At the end of the article they came to the conclusion that there is a "seismic gap" between the younger and older generations when talking about the modern use of our informal language. They found that this had been caused by children's constant use of their phones which creates limitations of speaking with people and creates a barrier. Older mobile phones which had three or four letter son each key, caused children to invent language using as little letters as possible, this made acronyms like "M8" and "GR8". However, the article did mention that these terms are now "extinct" from language use as it is considered an old use of language as now we have more advanced phones which don't require us to press the same key three times. Later, he then went on to explain how emojis are becoming the new form of language as they can show someone how were feeling and require minimum effort in doing so.