This is a question to those who know Ulster Irish well. How common is cha in Donegal? As far as I know, it’s never (or very rarely) used in Southern Donegal around Teileann, but increases in usage as one goes further North. But how common is it there? Is there any area or village where only cha is used? And how is the proportion, roughly, in places like Rann na Feirste, Gaoth Dobhair and Gort a’ Choirce? And is it just random, or are the some cases where cha is more (or less) likely to be used.
I always found this aspect of Ulster Irish interesting, but I know far too little about it.