Tynged Yr Iaith and The 1961 Census
see also Tynged yr iaith
In 1962 Lewis gave a radio speech entitled Tynged yr iaith (The Fate of the Language) in which he predicted the extinction of the Welsh language unless action was taken. Lewis' intent was to motivate Plaid Cymru into more direct action promoting the language, however it led to the formation of Cymdeithas yr Iaith Gymraeg (the Welsh Language Society) later that year at a Plaid Cymru summer school held in Pontardawe in Glamorgan. The foundation of Cymdeithas yr Iaith Gymraeg allowed for Plaid Cymru to focus on electoral politics, while the Cymdeithas focused on promoting the language.
Lewis gave his radio speech responding to the 1961 census, which showed a decrease in the number of Welsh speakers from 36% in 1931 to 26%, out of a population of about 2.5 million. In the census; Merionnydd, Ynys Mon, Carmarthen, and Caernarfon averaged 75% concentration of Welsh speakers, with the most significant decrease in the counties of Glamorgan, Flint, and Pembroke.
Responding on the calls of Welsh devolution, in 1964 the Labour Government gave effect to these proposals establishing the unelected Welsh Office (Welsh: Swyddfa Gymreig) and Secretary of State for Wales.
Read more about this topic: Saunders Lewis