Hi, there have been several questions about the languages spoken in Scotland. Here are are few to get you started:
Why and when did Scots start speaking English and abandoned Gaelic? featuring /u/MoragLarsson
When did the majority of Scots and Irish people stop speaking Gaelic? featuring /u/gothtard
When did the Scottish start replacing Gaelic with English? featuring /u/gingerkid1234
When did the English language become dominant language in Britain and Ireland? featuring /u/ZimbaZumba
Related threads:
What are the main factors behind the decline of the Scottish Gaelic language? featuring /u/siecle and /u/lngwstksgk
How did the Highland people of Scotland end up speaking a Celtic language (Scottish Gaelic), while the Lowland people of Scotland ended up speaking a Germanic language (Scots)? featuring /u/needais
Would medieval and Early Modern Scotland have predominantly spoken Gaelic? featuring /u/mormengil
At the time of James I (VI) was Scottish already anglicized or was it still distinctly Scottish? featuring /u/talondearg
These posts have all been archived by now, so if you have follow-up questions for any of the users therein, just ask here and tag their username to notify them