(used with a singular verb) the literary form of the English dialect of the Scottish Lowlands, representing a mixture of the several spoken subdialects.
British Dictionary definitions for Lallans
Lallans
/ˈlælənz/
noun
1.
a literary version of the variety of English spoken and written in the Lowlands of Scotland
2.
(modifier) of or relating to the Lowlands of Scotland or their dialects