From the site:
Sawatdee Khrab!" That is how we say hello in Thai. If you are a girl you will say "Sawatdee Kaa". When you are on holiday in Thailand, you will find many young people like me who can speak English. Most places you go to you won't have a problem. However, we like it a lot when we meet a foreigner who has tried to learn some Thai phrases. Most web sites and phrase books just write down the Thai words using Roman letters for you to try and read. That is a waste of time because Thai is a tonal language. You need to listen to native speakers. That is me, my teacher and friends! On every page you will be able to listen to us speaking Thai.