Ann is John's wife
Stephen is David and Kate's son
Ann is Stephen's aunt
Sam is Mary's husband
Mary is Carrie, Jessica and Stephen's grandmother
Carrie and Jessica are Stephen's cousins
David is Carrie and Jessica's uncle
Jessica is Sam and Mary's granddaughter
Carrie is David and Kate's niece
Jessica is Ann and John's daughter
<span> Nowadays there are about six thousand languages around the world. But
many languages are endangered. And even greater number <u>s</u> are extinct.</span><span>At all times,<span><u> </u> l</span>anguage was not only a means of communication, but
also <u>part of</u> cultural heritage. Language<u>s</u> vanish when <u>their</u> last speaker dies. <u>With</u> them dwindles <u>the world</u><u>’s</u> culture <u>and</u> a
piece of history disappears. For example, in the works of <u>the</u> well-known British linguist David
Crystal, <u>the formerly
unknown</u><u> to the world</u> Kasabe language<u><span> was recovered</span></u>.
Its last native speaker
died in 1996, leaving absolutely no information about the language and its
history. So, what will
happen to the world if languages continue to disappear? Rare languages will
disappear first. As a result, many centuries later the "giant" languages’ turn
will comes. This
means that some day people will
lose their ability to communicate with each other, world culture will be
devastated, a general degradation will start. Humanity will return to the primitive age. Do we want such
an outcome?</span>
Прежде, чем работать над грамматикой, надо бы поработать над стилистикой.
А то, коряво местами, не говоря уже о том, что - спорно. Но это уже вопрос к автору.