He didnt go to school. Where do you expect him to learn?
Walk around to any Malay he found on the street, and ask him to conduct Malay class for free?

Malaysia is not high level society.
You can live your life without even speaking out.
Maybe during any government related issue, but you dont need to do it on a daily basis. Maybe once in awhile. Probably someone will help him.

Most people live out their daily life without talking to neighbours.
Just try going to the mall yourself.
Try to count how many time you speak to random strangers? Probably you can count with your own fingers.

An old uncles dont need to talk much in everyday life. Stop being a dick.
I have seen young working adult not able to construct half a sentence in front of angmoh, and he still working as a professional !
You probably got more fun poking on the professional that mumbling in front of angmoh than an old uncle that couldnt speak english or malay !

Uncle didnt go to school.
Dont poke fun on people misfortune.
Be man.
Not a dick.