ประเทศใดในรัฐบาลสาธารณรัฐเพียงประเทศเดียวที่พูดภาษาใด
Which languages are spoken by only one country in republic governments?
countrylanguage = pd.DataFrame(columns=['Language', 'CountryCode']); country = pd.DataFrame(columns=['Code', 'GovernmentForm'])
countrylanguage[countrylanguage['CountryCode'].isin(country[country['GovernmentForm'] == 'Republic']['Code'])]['Language'].value_counts()[countrylanguage['Language'].value_counts() == 1].index