Scotland is the wild, hilly northern part of the island England is on. The two ethnic groups have warred for centuries, but finally were united when a Scottish King, James VI, inherited the English throne and became known as James I of England. Traditionally the men wore a dress called a kilt. They ate stuffed sheep's stomach called haggis and drank whisky. They threw tree trunks around for sport, called caber tossing. The men are real men, the women are real women and the hills are purple with heather (a wild flower).
Scotland has many local varieties of English. The pronunciation of Scottish English is generally understandable by people from England. However there are some differences. Unlike some parts of England, the Scots pronounce the /r/ sound after a vowel in words like hard, first and butter. Vowel length varies slightly. However the most obvious difference are local words that England's English does not have. (See below)
The Scots use the letter yogh . It represents y-sound in yolk. This letter existed in England during the Middle English period (1066 - 1485), but has since died out. It still appears in a few names, but is usually written Z z. It will likely slowly be dropped from use in Scottish English, just as it was in England.
England's English is used as the language of religion, education and government. It is higher status and speaking it is needed to be successful in society. However the RP variety of England's upper class has almost no presence in Scotland. So business is normally not done using Scottish English. You may use the same international English used elsewhere.
Scottish English descends from the 5th century English invaders, just like the other UK varieties. It was also influenced by the same foreign languages that transformed the other varieties. It is just another mixture of local varieties of UK English. Today, some Scottish words are used in other parts of the UK and the world. So despite some differences, Scottish English is just another group of local British English varieties.
Scottish Words Used in English Worldwide
(I lived in Scotland and went to school for a short time when I was young. However I cannot pronounce these words in the traditional local fashion. Instead I choose to pronounce them as clearly and internationally as possible.)
auld lang syne
days of long ago
1. thick oatmeal cake (UK)
2. campfire bread, not necessarily made with oats (Canada)
pretty (also common in Northern England)
blackberry (also common in Northern England)
a pile of stone used to mark a location
(ice-cream) cornet (also common in the US)
small Scottish farm
a type of Scottish dagger (double edged knife)
serious, unfriendly and gloomy (often an adjective, not a verb)