English Translation
There’s a big sale at the mall today.
Gemini says
" Il y a une grande promotion au centre commercial aujourd’hui – It is grammatically correct, but it sounds slightly odd to a native ear because of the singular word “une”.
Here is why:
In French, “une promotion” (singular) usually refers to one specific deal or marketing campaign (e.g., “Buy 2, Get 1 Free on shoes” or “A contest to win a car”)."
and instead suggests "If you mean that many stores have price cuts and there are deals everywhere, you should use the plural:
“Il y a de grosses promotions au centre commercial aujourd’hui.” (There are big promotions at the mall today.)
This implies that if you walk in, you will find sales in various stores, which is usually what “There’s a big sale” means in English."