You are welcome to send comments and questions about the material on this site, by e-mail to post@cyfwe.org.

Mae croeso i chi anfon sylwadau ac ymholiadau am y deunydd ar y safle hwn, trwy e-bost i post@cyfwe.org.

Professor Dafydd Johnston can be contacted at the Department of Welsh, University of Wales Swansea, Singleton Park, Swansea SA2 8PP, Wales tel. +44 (0)1792 295192.

Sioned Rowlands can be contacted at Mercator, University of Wales Aberystwyth, Ceredigion, SY23 2AU, Wales, e-mail sioned.rowlands@st-antonys.oxford.ac.uk tel. +44 (0)1970 622544.