French phrase
Je demande que ~ ne se reproduise pas.
Meaning
I demand that ___ not happen again.
When to use it
A strong demand to prevent something from recurring. Used from personal warnings to formal complaints and often conveys strong dissatisfaction.
Example dialogue
Je demande que ce comportement ne se reproduise pas.
I demand that this behavior not happen again.
Ça ne se reproduira plus, promis.
It won't happen again, I promise.