After obtaining a first class honours degree in French, then an MA in Applied Linguistics from Bangor University, Delyth worked as a Research Officer in the Welsh Department at Cardiff University, where she started a PhD describing the communicative competence of children from English-speaking homes who attend Welsh medium schools. She worked for five years at Trinity College, Carmarthen as a Research Fellow and Course Director of the MA in Bilingual Studies: A European Dimension before following a PGCE course in Aberystwyth University. She was a French Teacher and Head of Department in a secondary school before becoming a Link Tutor for International Languages on the PGCE at Aberystwyth University in 2019. She is also responsible for the development of Welsh language skills of all PGCE students.