I have just found out that not pronouncing the arabic alphabets correctly nullifies a salaat. I used to pronounce incorrectly.

The statement you make is very general, hence, incorrect. Correct pronunciation of the Arabic letters is very important, and every Muslim should do his utmost to learn and practice this branch of Deen. But only on a very few rare occasion will this mispronunciation lead to the Salaat becoming nullified. The Salaat will only be nullified if one is sure that such a serious and rare error has indeed occurred. Since you are not sure of such an errorm your Salaat is considered valid and you do not have to repeat your Salaat.

However, do make an earnest effort to learn Tajweed (science of pronunciation).

and Allah Ta'ala Knows Best

Moulana Imraan Vawda
FATWA DEPT.

CHECKED AND APPROVED CORRECT: Mufti Ebrahim Desai