Based on my experience you can ask for Thai spicy. It also works in Indian restaurants if you ask for Indian spicy. So far I have gotten what I asked for.
My latest experience in my local Indian restaurant resulted in the waiter to double check if we understood what we asked for. Once we got our food he was eyeing us the whole time to see if we would survive haha
I seem to recall that Thai places have a special spiciness scale, it goes…
Mild
Medium
Spicy
Extra spicy
Thai mild
Thai medium
Thai spicy
Thai extra spicy
Whether it’s true or not, I don’t know, and I plan to never personally find out.
Based on my experience you can ask for Thai spicy. It also works in Indian restaurants if you ask for Indian spicy. So far I have gotten what I asked for.
My latest experience in my local Indian restaurant resulted in the waiter to double check if we understood what we asked for. Once we got our food he was eyeing us the whole time to see if we would survive haha