1
" Language death is like no other form of disappearance. When people die, they leave signs of their presence in the world, in the form of their dwelling places, burial mounds, and artefacts - in a word, their archaeology. But spoken language leaves no archaeology. When a language dies, which has never been recorded, it is as if it has never been. "
― David Crystal , How Language Works: How Babies Babble, Words Change Meaning, and Languages Live or Die
3
" In Old English, thou (thee, thine, etc.) was singular and you was plural. But during the thirteenth century, you started to be used as a polite form of the singular - probably because people copied the French way of talking, where vous was used in that way. English then became like French, which has tu and vous both possible for singulars; and that allowed a choice. The norm was for you to be used by inferiors to superiors - such as children to parents, or servants to masters, and thou would be used in return. But thou was also used to express special intimacy, such as when addressing God. It was also used when the lower classes talked to each other. The upper classes used you to each other, as a rule, even when they were closely related.
So, when someone changes from thou to you in a conversation, or the other way round, it conveys a different pragmatic force. It will express a change of attitude, or a new emotion or mood. "
― David Crystal
16
" The two billion people who speak English these days live mainly in countries where they’ve learned English as a foreign language. There are only around 400 million mother-tongue speakers – chiefly living in the UK, Ireland, USA, Canada, Australia, New Zealand, South Africa, and the countries of the Caribbean. This means that for every one native speaker of English there are now five non-native speakers. The centre of gravity in the use of English has shifted, therefore. Once upon a time, it would have been possible to say, in terms of number of speakers, that the British ‘owned’ English. Then it was the turn of the Americans. Today, it’s the turn of those who have learned English as a foreign language, who form the vast majority of users. Everyone who has taken the trouble to learn English can be said to ‘own’ it now, and they all have a say in its future. So, if most of them say such things as informations and advices, it seems inevitable that one day some of these usages will become part of international standard English, and influence the way people speak in the ‘home’ countries. Those with a nostalgia for linguistic days of old may not like it, but it will not be possible to stop such international trends. "
― David Crystal , Making Sense Of Grammar
