Is lassie gaelic or scots or something else?

Question

I'm writing a story and i wanted to know is lassie scottish Gaelic or scots or some other Scottish language or is it slang? Thank you for your help.

Answer 1

"Lassie" is the word for '(little) girl' in Scottish, AKA Scots, and also in Northern English dialects such as Geordie and Northumbrian.

Answer 2

Being of part Scottish ancestry myself, I am glad to report the following:

lass  

c.1300, from a Scandinavian source, probably akin to O.Swed. løsk kona "unmarried woman," but also perhaps related to O.N. loskr "idle, weak," W.Fris. lask "light, thin." "Used now only of mean girls" [Johnson, who also has lasslorn "forsaken by his mistress"]. Scottish dim. lassie first recorded 1725.  

Answer 3

Scots was a distinct language from English until at least the Eighteenth Century - though the two languages were so close that most of the time a speaker of one would understand the other.

(Most of the time: an ordinary English speaker would probably still have problems with a sentence such as: 'I amna fou sae mickle as teird.').

Lassie was the Scots word for 'young woman'. It has survived as a local word into modern Scottish English.

'Lass' was found all over standard English, but was especially common in the North of England (north of Chester, say).

But Scots is completely different from Gaelic. Scots is a Germanic language - like German, Dutch and English. Gaelic is a Goidelic language - like Irish and Manx.