Census 2011 shows Welsh speaking areas in decline
30 January 2013 Last updated at 19:27 GMT
There has been a fall in the number of places where over half the population can speak Welsh, the latest figures from the 2011 census show.
There are 157 council wards with over 50% of residents who are Welsh speakers in 2011, compared to 192 in 2001.
The Welsh Language Society accused the Welsh government of failing to halt the decline of Welsh speaking communities.
A Welsh government spokesperson admitted it needed to do more to "promote and facilitate" the language.
Cemlyn Davies reports, and BBC Wales Today presenter Lucy Owen speaks to Welsh affairs editor Vaughan Roderick.