It is necessary to have good English language skills. The number of people not much Thailand could use the equivalent English native speakers. Therefore, workers with language skills, it will continue to work in the country.
It is necessary to have good skills in English. Thailand not many people who can use English language equivalent. Therefore, workers with language skills are not good, it will aim to work in the country.
It is necessary to have good skills in English. The few that can use the English equivalent to native speakers. So skilled workers, the bad language will focus on work in the country.