History of Scottish Gaelic
All surviving dialects are Highland and/or Hebridean dialects. Dialects of Lowland Gaelic have become defunct since the demise of Galwegian Gaelic, originally spoken in Galloway, which seems to have been the last Lowland dialect and which survived into the Modern Period. By the 18th century Lowland Gaelic had been largely replaced by Lowland Scots across much of Lowland Scotland. According to a reference in "The Carrick Covenanters " by James Crichton, the last place in the Lowlands where Scottish Gaelic was still spoken was the village of Barr in Carrick: only a few miles inland to the east of Girvan, but at one time very isolated. Crichton gives neither date nor details.
Manx language
Manx (native name or , pronounced or or ), also known as Manx Gaelic, and also historically spelled Manks, is a Goidelic Celtic language of the Indo-European language family, that was spoken as a first language by the Manx people on the Isle of Man until the death of the last native speaker, Ned Maddrell, in 1974. Despite this, the language has never fallen completely out of use, with a minority having some knowledge of it; in addition, Manx still has a role as an important part of the island's culture and heritage. Manx has been the subject of language revival efforts with estimates, in 2015, of around 1,800 people with varying levels of second language conversational ability. Since the late 20th century, Manx has become more visible on the island, with increased signage, radio broadcasts and a bilingual primary school. The revival of Manx has been made easier because the language was well-recorded; for example, the Bible had been translated into Manx, and audio recordings had been made of native speakers.