Maybe do both and co-create your own glossary, going through the terminology used in Agile and asking the delivery team what words they want to use.
Efallai gallwch wneud y ddau a chyd-greu eich geirfa eich hun, gan fynd trwy'r derminoleg Ystwyth a gofyn i'r tîm gynnig pa eiriau maen nhw am eu defnyddio.