I think that there is a lot of history and geography involved in the difference between the relative success of Welsh and Gallic.

In Wales there are several strongly delineated areas where Welsh is the first language and even those those areas now anglicised there is a long tradition until the nineteenth century. The valley where I live was Welsh-speaking until the coming of the mines for example.

There are long standing Bardic traditions such as Eisteddfodau and also there were people prepared to fight for a fair share in the media which culminated in the foundation of a Welsh language channel (probably the most heavily subsidised in the Word) - Sianel Pedwar Cyrmu or S4C for short. Campaigns were also fought for bilingual road signs and the Welsh Language Society (Cymdeithas yr Iaith Cymraeg) had long been a vociferous campaigner for offical bilingual use.

In Scotland there was the fact that English has been predominant in the Lowlands for centuries - albeit in the dialect known as Scots, and after 1745 even in the highlands and the prohibitions which followed regarding the wearing of highland dress, Gallic's retreat was profound. No doubt it was made even worse by the scandal of the Victorian Highland Clearances also so that today it is only in the Islands of the West that you have a chance of hearing it in everyday usage.

Sure you get the bilingual road signs in the Highlands, but in July I heard no Gallic spoken at all and my friend in Ullapool said you had to go to the Western Isles to hear it on a frequent basis. Grampian TV does have a Gallic soap opera but I don't know how popular it is.

There are the Mods, which are the Gallic equivalent of the Eisteddfodau, but they don't seem to get the same media coverage from what I can gather.

I guess you have a far higher chance of hearing Gallic spoken in Cape Breton Island than you do in Edinburgh or Inverness.