If you want to send SMS to Thailand you should try SMS Thailand. They offer a free trial off 5 point on translated SMS. After that you need to pay a small fee for every SMS but its very cheap considering you get them translated to Thai in the same time.
It is perfect if you have a Thai girlfriend or something that you want to send SMS to. She can also send SMS back to you from Thai language into English.
Go and try some free SMS to Thailand right now.