By 1400 most English families, and those from Lowland Scotland, had adopted the use of hereditary surnames.

到了1400年，大部分的英格兰人和来自苏格兰低地的人习惯了家庭姓氏的使用。

youdao

Academics are divided about the status of language which is based on English with influences from Irish, Scots Gaelic and Lowland Scots.

BBC: New Ulster-Scots institute