Deddf Cynulliad Cenedlaethol Cymru (Ieithoedd Swyddogol) = National Assembly for Wales (Official Languages) Act, Ychwanegu i'r clipfwrdd dccc/anaw/2012/1. Ffeil = File 2012. Rhan oMesurau a Deddfau Cynulliad Cenedlaethol Cymru = National Assembly for Wales Measures and Acts,