Fifth in the five-part series. It is predicted that within a century more than half of the world's languages will become extinct, but as languages are lost, new ones emerge naturally or are constructed. Noam Chomsky, Esperantist Thomas Eccard, endangered languages researcher Peter Ladefoged who has since passed away, and others provide insights into the life cycle of language. Topics include constructed languages (such as Esperanto), language endangerment and preservation, and the role of globalization in language obsolescence. The experts also discuss current language trends and offer their opinions on which languages may emerge as front-runners in the future. Accessibility options on the DVD are: (1) audio description, (2) expanded audio description, (3) English SDH subtitles, (4) closed captions.