Hi is just hi, but most people from the Netherlands will say "Hallo"!
'Hi, how are you doing?' is 'Hei, mitä kuuluu?' in Finnish.
hi how are you doing
Hi jack is the same as it is in English. It is mostly used in Netherlands as language.
hi how're yeh daein'?
Hallo daar is a Dutch equivalent of 'Hi there'.
Dutch is the modern European language.. so it is Hallo
Hoi! Ik kom uit Amerika
Just smile and say it like you mean it
Salut! ça va?