Well over five thousand languages are known to exist or to have existed in the world, but hundreds of these are no longer living languages used by speakers and speech communities in their day-to-day activities and lives. Some of them lead a pseudolife as revered monuments of the past which still have some restricted and specialised roles to play today, such as Latin, Ancient Greek, Church Slavonic and others, but most of them are of interest and concern only to a small group of linguists, historians and some other experts who look at the past. Many languages have disappeared without being known to us in any great detail, with only some fragmentary materials in them - written or noted down by speakers or observers of them hundreds or even thousands of years ago - at our disposal to give us some idea as to what those languages were like. Others have disappeared without even that scanty information about their nature being available to us; only their names are known from historical records, or perhaps some remarks were written down by someone many years ago and were preserved over the ages to tell us something about some special features of such a language or such languages and who and what kind of people their speakers were. Many other languages, certainly a much larger number than the dead languages about which we know something, have disappeared without our knowing anything of or about them.