Welsh apparently is still in a vulnerable position. The reality is of course it has persevered and survived when surrounded by the language of Empire (English). The story of its survival is one that should be celebrated.
Enabling every child of primary school age to be educated in Welsh, as has happened in Catalonia, would be a good place to begin. The case for bilingual education is overwhelming, and indeed in my experience of going into Welsh primary schools, children are sponges and can gain a command of the language with relative ease.
Another good step would be the active encouragement of each person moving to Wales to learn some Welsh. Cost of classes are reasonable. I have paid £90 for 30 weeks (that is £3 per week) and at 3 hours per week… it is a £1 an hour. There is no excuse really. Or is there?