New York, April 24 -- The UN Educational, Scientific and Cultural Organization UNESCO has long celebrated the power of International Book and Copyright Day, marked on 23 April, but this year, special attention is being paid to the protection of indigenous languages, many of which are threatened with extinction. Beyond just pure enjoyment, books have always been considered a bridge between generations and across cultures. Books are a form of cultural expression that lives through and as part of a chosen language, said UNESCO Director-General Audrey Azoulay, in a message for the day. Each publication is created in a distinct language and is intended for a language-specific reading audience. A book is thus written, produced, exchanged, used an...