Around 80% of parents who send their children to Welsh-medium schools don't speak the language themselves.
In Northern Ireland the figure is even higher - 90%.
So why the rise?
For many parents, sending their children to a Welsh-medium school is viewed as a way of reclaiming part of their culture which wasn't available when they were young and the sector was much smaller.
Others are acutely aware of the impressive exam results delivered by many Welsh-medium schools, while for some, the changing face of Wales and the post devolution world could explain their choice..
Of course, it shouldn't come as a surprise that progress doesn't come without a struggle.
In Cardiff, Welsh-medium schools are all heavily oversubscribed and the local authority is currently attempting to institute an ambitious city-wise reorganisation plan which takes into account this swing towards education in Welsh.
But it has been highly controversial - initial attempts to close some English-medium schools with falling rolls has met with huge opposition.
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