Re: Losing one's accent and getting it back possible?
I spent my early childhood on the West coast of the far North of Scotland, then moved to the East coast [some 80 miles as the crow flies] aged 11 to go to Secondary School - and could hardly understand a word my classmates were saying. I went to university in the South of Scotland, and since then have lived mainly in England, with some time spent in Germany and various other countries around the world. To me, my accent still sounds exactly as it did when I was 10 - but no-one else can ever identify my background. Most people think I am Canadian; others guess Northern Irish, some New Zealand, and some even Cornish! I'm sure that if I went back to my roots I would soon settle back into the local accent, which derives from a gaelic-speaking culture. My grown-up children still derive enormous amusement from hearing me pronounce "horses" as "horshes"....
I'm not a teacher of English, but I have spoken it for (almost) all of my life....