The Language of Cornwall (UK, not Stateside!) known, obviously, as Cornish. Linked to the other Celtic/Gaelic languages (where they still exist).
Synonyms for Cornish
On this page, you will find 30 slang terms related to Cornish. Some of the top words include: Queens English, singlish, Clarty, sober Irishman, Nae, and 25 more.