extract country display names in different languages

makeCountriesJSON.m

-(void)makeCountriesJSON
{
    NSArray<NSString*> *localeIds = @[@"pt", @"en"];
    NSArray<NSString*> *countryCodesArray = [NSLocale ISOCountryCodes];
    
    NSMutableString *json = [NSMutableString stringWithString:@"{"];
    
    [localeIds enumerateObjectsUsingBlock:^(NSString * localeId, NSUInteger localeIndex, BOOL * _Nonnull stop) {
        
        NSLocale *locale = [NSLocale localeWithLocaleIdentifier:localeId];
        
        [json appendFormat:@"\"%@\": {", locale.localeIdentifier];
        
        [countryCodesArray enumerateObjectsUsingBlock:^(NSString *code, NSUInteger codeIndex, BOOL * _Nonnull stop) {
            
            [json appendFormat:@"\"%@\":\"%@\"", code, [locale displayNameForKey:NSLocaleCountryCode value:code]];
            
            if (codeIndex < countryCodesArray.count-1)
            {
                [json appendString:@","];
            }
        }];
        
        [json appendString:@"}"];
    
        if (localeIndex < localeIds.count-1)
        {
            [json appendString:@","];
        }
    }];
    
    [json appendString:@"}"];
    
    NSLog(@"%@", json);
}