When visiting Thailand it is a good idea to learn some Thai words.
You probably won't need to use much if you stick to the main tourist destinations.
However, the Thai people you encounter will be impressed for sure if you try and use a little Thai with them.
You will hear that Thai is a tonal language so unless you "sing" the word in exactly the right way you probably won't be understood.
Throughout this web site you will be able to listen to Thai and see a pronunciation guide using Roman letters.
Give it a try! Chok dee