لخّصلي

Every language has a history, and, as in the rest of human culture, changes are constantly taking place in the course of the learned transmission of a language from one generation to another.Diversification of Languages In the structural aspects of spoken language, their pronunciation and grammar, and in vocabulary less closely involved in rapid cultural movement, the processes of linguistic change are best observed by comparing written records of a language over extended periods.But, in some areas of vocabulary, particular words closely related to rapid cultural change are subject to equally rapid and therefore noticeable changes within a generation or even within a decade.

Every language has a history, and, as in the rest of human culture,
changes are constantly taking place in the course of the learned
transmission of a language from one generation to another. This is just
part of the difference between human culture and animal behavior.
Languages change in all their aspects, in their pronunciation, word
forms, syntax, and word meanings (semantic change). These changes
are mostly very gradual in their operation, becoming noticeable only
cumulatively over the course of several generations. But, in some areas
of vocabulary, particular words closely related to rapid cultural change
are subject to equally rapid and therefore noticeable changes within a
generation or even within a decade. In the 20th century the
vocabulary of science and technology was an outstanding example. The
same is also true of those parts of vocabulary that are involved in
fashionable slangs and jargons, whose raison d’être in promoting
group, particularly age-group, solidarity depends on their being always
fresh and distinctive. Old slangs date, as any novel or film more than 10
years old is apt to show.
Diversification of Languages
In the structural aspects of spoken language, their pronunciation and
grammar, and in vocabulary less closely involved in rapid cultural
movement, the processes of linguistic change are best observed by
comparing written records of a language over extended periods. This
is most readily seen by English speakers through setting side by side