The 5th edition of the EF English Proficiency Index ranks a total of 70 countries and territories.

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Very Low Proficiency
EF EPI Score: 45.35
#14/16 in Asia

Thailand’s English proficiency remains low despite the country’s large tourism industry. Starting last May, the Thai government mandated that schools align their English teaching to the Common European Framework of Reference for Languages (CEFR) in order to standardize teaching nationally. They also set the modest goal of a B1 level in English for all high school graduates. 

English Attack! Thailand