A meta tag attempting to declare the character encoding declaration was found too late, and the encoding was guessed from content instead. The meta tag needs to be moved to the start of the head part of the document.
Cafwyd hyd i dag meta yn ceisio datgan y datganiad amgodio nod yn rhy hwyr, a dyfalwyd yr amgodio o'r cynnwys yn lle hynny. Mae angen symud y tag meta i ddechrau rhan pen y ddogfen.