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".
Belgae
Caesar's book The Gallic Wars begins: "All Gaul is divided into three parts, one of which the Belgae inhabit, the Aquitani another, those who in their own language are called Celts, in ours Gauls, the third. All these differ from each other in language, customs and laws." However, many modern scholars believe that the Belgae were a Celtic-speaking group. On the other hand, at least part of the Belgae may also have had significant genetic, cultural, and historical connections to peoples east of the Rhine, including Germanic peoples, judging from archaeological, placename, and textual evidence. It has also been argued based on placename studies that the older language of the area, though apparently Indo-European, was not Celtic (see Nordwestblock) and that Celtic, though influential amongst the elite, might never have been the main language of the part of the Belgic area north of the Ardennes. For example, Maurits Gysseling, suggest that prior to Celtic and Germanic influences the Belgae may have comprised a distinct Indo-European branch, termed Belgian.