It is true that the dearth of vowels is found only in Welsh.

Sorry to have offended your finer sensibilities.

To me, there are similarities in those languages in that they are, none of them, pronounced even remotely like they are spelled. And I did hear, on a Celtic music program, (Fiona Ritchie; Thistle and Shamrock) Breton referred to as "a Gaelic language". Though, now that I think about it, she may have said, 'a Celtic language'.

Anyway, to return to the topic, it is a lovely CD and people should buy it, and learn how to pronounce the name of track 6.
Blessings,
Barbara