Good luck with that = viel Glück damit
"Viel Glück"
Viel Glück !
"Viel Glück Kinder" would be the right phrase.
bad luck in German language mean[pech]
Viel glück und bis bald ( wiedersehen)
German: Viel Glück French: Bonne chance Italian: Buona fortuna
The German expression "viel Glück" means "Good Luck".
"Glück" is the word you are looking for.
Viel Glück!
To say "good luck" in Polish, you would say "powodzenia."
"Viel Glück" means "Good luck".
Kia manuia - Good luck