Give the head of the state of the country with the lowest percentage use of English as their language.
head of the state refers to HeadOfState; lowest percentage use of English as their language refers to MIN(Percentage WHERE `Language` = 'English');
SELECT T1.HeadOfState FROM Country AS T1 INNER JOIN CountryLanguage AS T2 ON T1.Code = T2.CountryCode WHERE T2.Language = 'English' ORDER BY T2.Percentage LIMIT 1