Fòram na Gàidhlig

Pre-aspiration occurs in ALL dialects, it is however more obvious in some dialects than others.

Pre-aspiration only affects 3 consonants - c, p and t, whether broad or slender. These are 'voiceless' consonants so gain pre-aspiration in the middle/end of a word, their 'voiced' equivalents - g, b and d become unvoiced in the middle/end of a word.

Note in the case of 'c' the pre-aspiration is actually the 'ch' sound in a lot of dialects.

In the case of rd/rt most dialects insert a 's' sound inbetween and this blocks the pre-aspiration. Where the 's' sound does not happen the pre-aspiration is evident in rt but NOT rd.

i'm pretty sure they don't have pre-aspiration (ro-anaileachd ) at all in some of the mainland dialects.

Well we can always look to one thing - Gaelic (and prpbably just about every other language written in the Roman Alphabet) will ALWAYS have a more regular spelling system than English

Gun teagamh sam bith

That's why I love the new bilingual road signs, at last I know how to pronounce the place names