Informal:
* "Hello": This is the most common and widely understood greeting.
* "Hiya": A shortened and more informal version of "hello," often used among friends and family.
* "How do you do?": A polite greeting, typically used when you're being formally introduced to someone.
* "Right you are": This is a friendly and informal greeting, often used to acknowledge someone's presence or to start a conversation.
Formal:
* "Good day": A polite and formal greeting.
* "Good morning/afternoon/evening": More formal than "hello" and used depending on the time of day.
In Scottish Gaelic:
* "Halò": This is the direct translation of "hello" in Gaelic.
It's important to remember that many Scots people will understand English, so simply saying "hi" will usually suffice. However, using some of the phrases above can show that you're aware of Scottish culture and make your greeting more personal.