Information from: “Manx's Surprising Revival” . Harrison, K. David (2015) Huffington Post
"Manx was declared extinct after the 1974 passing of 'last speaker' Ned Maddrell ... but the language... has returned to daily use"
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"In the 1980s, activists who had learned Manx as adults launched a bold social experiment. They raised their children bilingually, speaking exclusively Manx to them in the home, and letting them speak English elsewhere. These children, now grown, are the 'new native speakers.'"