The Thai Language
The fact is that most people who visit Thailand are not fluent in Thai. Now, it is not necessary to know even the most basic of Thai phrases to survive in Thailand since English is widely spoken, especially in tourist areas. Then, why learn Thai? Even a simple knowledge will help you immerse yourself into the Thai culture. If you ever get the opportunity to visit Thailand, you will find that speaking to natives in their own language will help show them that you are genuinely interested in their way of life, and in return they will be more eager to help you. Even if you never visit Thailand, learning an exotic language like Thai can be an adventure in itself.