Welsh Language Board head Meirion Prys Jones in crisis claim
Fifty years ago a radio lecture was broadcast credited with changing Welsh history.
Saunders Lewis' lecture warned that Welsh was on the brink of extinction.
It led to a wave of protests and eventually the language becoming a central part of schools and public life.
But the outgoing boss of the Welsh Language Board has warned that it is dying in its heartlands.
Welsh Affairs Editor, Vaughan Roderick, reports.