Your link is to an opinion posted by an individual.

Try a posting from scotland.org that says, "English is the main language spoken in Scotland today and has been the since the 18th Century. However, there are a wide range of different accents and dialects spoken across the country. From the largest cities right through to the smallest of our islands, differing accents can be found. These range from soft and sing-song to stronger and more pronounced."

Scottish Language | Language in Scotland — The Official Gateway to Scotland

Carl in Tampa