Given how important this definition is in terms of quantifying the numbers of new adult speakers of Welsh and of policy, there is a need for further research to confirm this definition.
O ystyried pa mor bwysig y mae'r diffiniad hwn o ran meintioli nifer yr oedolion sy'n siaradwyr Cymraeg newydd, ac o ran polisi, mae angen gwneud mwy o waith ymchwil i gadarnhau'r diffiniad hwn.