Thai vendors use simple words or simple sentences to communicate with foreigners. Sometimes they use hand gestures, dictionaries or calculators to show their goods and prices. They don’t know how to negotiate with the foreigner and they always get confused, which creates obstacle to trade goods. Therefore I intended to explore how Thai vendors communicate with foreigners by giving a questionnaire to Thai vendors for writing details about trading goods and their type of goods, like Lanna handicrafts or accessories.