Why should you learn Thai language?

Because it makes your life easier when you stay in Thailand.
One of my students told me about his feeling that is "It's embarrassing."
He have been here over 10 years, but he can speak a little Thai language.
"It's not too late to learn language." I said to him one day.
"Let's study writing and reading Thai language because it's going to work
for someone doesn't like to speak Thai language." I suggested him.

After 2 months of learning writing and reading he can read and write Thai.
It's good way to learn this way as well because after he can read and write
he can study speaking from Thai alphabet. It works.