I like the page about what learning materials you recommend ("
Beyond Duolingo").
I like what you say about language learning and how the rules change when learning a language with few speakers, but I have my doubts about recommending materials that contain multiple dialects for beginners.
My thinking is: if a vowel is pronounced two different ways by a good speaker, there's usually a grammatical reason. If the learner is listening to 3 dialects, they'll hear that vowel pronounced 6 ways. When person A says "I have to go to booop" and person B replies "Lucky you, baaap is great", the beginner can't know if the change in pronunciation has a grammatical significance or it's just a dialectical feature.
At best this makes learning harder, and at worst the learner will form the bad habit of ignoring certain types of differences and searching elsewhere for the gist of the sentence. This probably wouldn't affect their progress at beginners' level, but anyone in this habit would struggle to make progress at intermediate level.
So my conclusion is that beginners should focus on a single dialect. The narrower the better. And when they're confident in their knowledge of how Irish pronunciation relates to Irish grammar, then they can start learning about other dialects. So, start as specialised as possible, and broaden later.
So one choice would be Connemara dialect, and the materials I'd recommend would then be:
Learning Irish (and Stenson's workbook)
To be used in that order.
I haven't found single-dialect materials of this quality and completeness for any other dialect, so Connemara dialect is what I'd recommend to a learner. With more choice, my personal preference would have been for Donegal Irish.
Of course, any serious learner will be listening to RnaG or TG4 and will have some level of exposure to other dialects anyway. A small amount isn't the end of the world.
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Pages I made:
(These are unfortunately offline for the near future, but they'll be back!)