We are multilingual here in Scotland.
Scots or lallans is spoken, or at least understood, in my area Edinburgh and Lothians. As Grandmabatty says, there is a concentration round about Burns Night in January. All my 4 DC won prizes for recitation and singing of Scottish songs.
Where DD lives further North, Gaelic is taught in school.
Gaelic came from Ireland originally but although many words are similar, they, Scottish Gaelic and Irish Gaelic are 2 distinct tongues.
My DB emigrated to Denmark many years ago and we've often discussed the similarity of many words.
The kirk is the church in both languages. Bord is the table. Barn and Bairn. Mouse pronounced moose is the same.
Ji, means I, pronounced yi.
Apparently fishermen who traded between Norway and Aberdeen could understand eachother.