I have a curious question, as a longtime adult learner of Irish and a very new one for Cymraeg. I figure that the distant ties more in the South Walian origins of its dialect to Irish colonization in early medieval times may have left "ghosts" in recent Welsh, cognates closer than Northern varieties at least once in a while. Anywhere that I could find an accessible (I am a scholar but no linguist) discussion of this? A medievalist expert in early Welsh I asked discouraged any hope of a clear comparison between such subsequently divergent languages, but here goes anyway.Related to this, I wonder if anyone's learned Welsh and then Irish, or vice versa, and has advice for transferring concepts or mind-maps from the one Celtic tongue to the other? Beginning Welsh, I keep making mental notes against my Gaeilge to help (or hinder) my comprehension of similar roots or patterns. I fully realize at least 1500 years or so has passed from the last full-on invasion of Cymru by their Hibernian cousins, but still, as a newbie with a comparative pan-Celtic urge to keep aligning ire with Cymru, I thought I'd ask.