You never say good luck on opening night

ROGER:
Ah, it's Bialystock and Bloom. Well, gentlemen ... merde!
CARMEN:
Toi, toi, toi
FRANZ:
Hals und Beinbruch!
LEO:
And I just want to wish everybody ... good luck!
CARMEN:
Ahhhhh!
ROGER:
Mr. Bloom, hasn't anyone ever told you...
It's bad luck to say "good luck" on opening night
If you do, I tell you
It is certain by the curtain
You are through!
MAX:
Good luck!
CARMEN:
It's bad luck to say "good luck" on opening night
Once it's said, you are dead
You will get the worst reviews
You've ever read!
MAX:
Good luck!
ROGER:
Even at the Comedie-Francaise,
On the opening night they are scared
"Bon chance, mes amis", no one says
The only word you ever hear is...
ROGER, CARMEN & FRANZ:
Merde!
MAX:
Good luck, good luck, good luck
FRANZ:
It's verboten, vishing "luck" on opening night
Take advice, don't think twice
Or your show will surely end
Up in the Scheiss!
MAX:
Guten lucken.
CARMEN:
At the famous La Scala in Milan On opening night it's a rule
"In boccu lupa" they say with elan
And just for luck they all shout...
ROGER, CARMEN & FRANZ:
"Bah fongool!"
LEO:
I got it!
Now I'll never say "good luck" on opening night
That's the rule, I'm no fool!
What do I say, I beg?
ROGER, CARMEN & FRANZ:
What you say is "break a leg"!
LEO:
Break a leg?
ROGER, CARMEN & FRANZ:
Yes, break a leg!
LEO, ROGER, CARMEN & FRANZ:
If you're clever...
MAX:
Good luck!
LEO, ROGER, CARMEN & FRANZ:
You'll endeavour
To never, never, never, never
Ever, ever, ever say...
...on opening night!