Thailand, English plays an important role in many businesses. For example, Wannapok (2004) explored the importance and the attitudes towards the English for business and technology in Thai context and found that Thai business organizations need to acquire staff that have high competencies in English to create good images of their businesses and also to attract international investment.
The role of English language skills for service industries is also significant. English language skills are necessary or desirable for people who work in the service business and must frequently deal with foreigners such as travel agencies, waiters, airline cabin crew, tourist guides, and tellers. Since the staff have to regularly deal with foreign customers, their degrees of English language skills especially in listening and speaking are considerably needed. Sufficient English competency could help the staff are able to communicate with their foreign customers effectively and successfully (Hall, 1976).