Sweden is a bit funny; we have a lot of words with the same meaning. An excellent example of this is the word “Hej”. Let’s go through the different words you can use to say hi to someone:)
Hej
Tja
Tjena
Hallå
Tjenis
Tjo
Hejsan
Halloj
Tjenare
Tjabba
Goddag
Goddagens
Hej svejs
Hej på dig
Hallå där
Tjing
Morsning
Morsning korsning
Tjohej
Tjenixen
Tjofräs
Hej hopp
Tjoflöjt
In more formal situations, I would suggest you use the word “Hej” or “Hejsan” though;)
Linnea, OLS Community Manager – Swedish

Source: Linnea, OLS Community Manager