What Is The Hebrew Word For Congratulations?

I don't understand why seemingly Hebrew speaking users say Mozel or Mazol.
If you want to say it, it goes Mazal Tov, emphasis the Zal.

Besides, I use Kol HaKavod. Emphasis on Vod.
Kol = All, Ha=The, Kavod=Respect.
Not a literary translation, but to me it bears the meaning of congratulations.