Bav34
...
Interesting, that.
SWMBO speaks Irish and I speak Welsh. We find lots of words have similar sounds, although different spellings as different groups of letters are used to achieve the sounds. Both branches use incomplete alphabets.
The differentiation in the languages predates Roman times but Welsh retains elements of Latin also found in Breton and French. Nevertheless the differences between Welsh and Irish are less than the difference between either and English I think.
But this is thread drift...
See these round Brittany quite often
http://www.theflagshop.co.uk/celtic-nations-flag-4316-p.asp