Changing language

From The Atlantic: "In our mouths or in print, in villages or in cities, in buildings or in caves, a language doesn't sit still. It can't. Language change has preceded apace even in places known for preserving a language in amber. You may have heard that Icelanders can still read the ancient sagas written almost a thousand years ago in Old Norse. It is true that written Icelandic is quite similar to Old Norse, but the spoken language is quite different — Old Norse speakers would sound a tad extraterrestrial to modern Icelanders. There have been assorted changes in the grammar, but language has moved on, on that distant isle as everywhere else."