It depends on the context.
Acceptable translations could be 'god' or 'bra' as noted below:
A good book = en bra bok.
Good food = god mat
Good morning = god morgon
Good evening = god afton
Good night = god natt
etc.
Worth noting that the translation for
(English) God = (Swedish) gud
(English) Bra = (Swedish) behå
:-)
---Original answer--- 'Good' is 'bra' in Swedish.
That is good. - Det är bra.
Hej då
Trevlig resa
Hej då
"Bra anmärkning"
It's "glad" or "trevlig" but when you say "Merry christmas" you say "God jul" in swedish! The word "God" is "Good".
Good bye = "Hej då", "adjö", or "farväl", you can also say "tja då"
Morrn or morgon
Ha en trevlig semester.
Spelled "Good hälsa". Prunounced "Good (but slower) hell-sah".
And is "och" in swedish.
"Var tomten snäll mot dig?"