Scottish Gaelic There's no word for Hello as such but a standard greeting is 'Shin thu ____' (pronounced HinOoh _____) where ____ is the person's name. It literally means 'There you are!'
Alternatively, Good morning/afternoon is usually used
Good morning- Madainn mhath (Ma-ting-va)
Good afternoon/evening- Feasgar math (Fay-scar-ma)
Some may also use Failte (Fal-tch-uh) but that literally means welcome.
And also Latha Math Dhut (La-Ma-Ghoot) which means Good day to you