I've written about current bands performing their own arrangements of songs originally recorded by folklorists on field recordings in 1930s Louisiana. It reminded me that I hadn't mentioned a similar project involving field recordings of a Scottish Gaelic singer from Duluth, Minnesota.
Manx--the ancient Celtic tongue spoken on the Isle of Man--had all but vanished by the 1970s. Defying the odds, it has returned to daily use through the heroic efforts of Manx language warriors. I visited the Isle of Man recently to hear the story of Manx's surprising survival.