ภูมิภาคใดบ้างที่ใช้ภาษาอังกฤษหรือดัตช์?
What are the regions that use English or Dutch?
countrylanguage = pd.DataFrame(columns=['CountryCode', 'Language']); country = pd.DataFrame(columns=['Region', 'Code'])
country[country['Code'].isin(countrylanguage[(countrylanguage['Language'] == 'English') | (countrylanguage['Language'] == 'Dutch')]['CountryCode'])]['Region'].unique()