Task: Text to Code
Input (English): SQL: SELECT Code2 FROM country GROUP BY Code2 ORDER BY Count ( * ) Desc LIMIT 1
Feedback: you have to calculate the percentage in step 1 and use language in countrylanguage. be certain the name is aruba.  
Output (English): SELECT T2.Language FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code  =  T2.CountryCode WHERE T1.Name  =  "Aruba" ORDER BY Percentage DESC LIMIT 1