Cannot say "lah" or "yah"!

What Mirzan is teaching me. 

"Eh you say lah! Miss Wong say cannot say lah!"

Today in 2 hours alone when conversing with him he caught me saying it at least 20 to 30 times. As much as I tried to stop myself, I found myself saying it sub-consciously. "Eh you say lah, again!"

I want to do it cos I do want him to practice the language properly besides our everyday 'lahs'  'lors' 'orhs' and 'yahs' since he's already on the right track.

"Next time you must think first.. use your brain and think. Promise you don't say lah or yah again?" holding out his cute pinkie.

I took his pinkie in mine in a swift and said "Yalah, yalah".

"YOU SAY YALAH AGAIN!!"  

Oops!