For Welsh and other languages, descriptions of learning indicate the progression of children aged 3 to 16, from starting with little or no language towards proficiency.
Ar gyfer y Gymraeg ac ieithoedd eraill, mae disgrifiadau dysgu yn dangos cynnydd plant 3 i 16 oed o ddechrau’n ddi-iaith neu gydag ychydig o iaith tuag at hyfedredd.