Thai is the native language.
The Thai baht is the currency.
It costs around 10 baht in the National Park which is the same as about $0.32.
The best meal was probably the chicken sandwich that I had after I spent almost half a day climbing up to see the falls, swimming and then climbing down. We packed very lightly so as not to tire us out on the climb up, so basically all I had were crackers and water bottles. Therefore my body was exhausted, dehydrated and starved. When my friends and I made it back to the original starting point, the entrance of the National Park, we hurried over to the food stands and ordered whatever could be prepared the fastest. We had only about 20 minutes before our van arrived to pick us up. I had a European-style sandwich with chicken breast, lettuce, mayo and tomatoes. Delicious!