Pointy, Welsh only declined because the English tried to kill it off, by force. The fact that people stood up to the bullying and managed to keep the language alive, when their children were being beaten for speaking it, is quite impressive I think. Speaking Welsh cost you status, money and the chance to do well in life. People of my grandfather's generation talk about the language as a handicap - being a Welsh speaker would 'hold you back'.
Given the historical and political responsibility the British state bears for throttling the language, it seems only right that we make some small effort to putting right that wrong.
Sadly, as some of the posts on this thread demonstrate, prejudice against Welsh is still a real issue.