Galwegian Gaelic
George Buchanan, himself a Gaelic speaker, writing in 1575, reported that Gaelic was still spoken in Galloway. In the middle of the century, 1563–1566, an anonymous English military investigator reported that the people of Carrick "for the most part specke erishe".
Celtic Revival
The Welsh language has been spoken continuously in Wales throughout recorded history, and in recent centuries has been easily the most widely-spoken Celtic language. But by 1911 it had become a minority language, spoken by 43.5% of the population. While this decline continued over the following decades, the language did not die out. By the start of the 21st century, numbers began to increase once more.